6·

. the given
. di.Ode in
8 sih~
,-Aer ror
-rn~• -t ,
,.,t.cr 01"
,.,.. o
, d tM an, voH'-"1 (2) 11 5 mA
me resd t?g 911.rtP1 " ~ . •
I
Cl,t;l.l I l I
1
'; 13 smA
cs •smA

(201a1
. t
transrs or, the phase difference between•~
"t
•ng an n-p-n (201~
·fier a·rcuit us,
emitter am pl I I will be: (2) 450
2 In a common tput voltages (4) 1350
1 and the ou
,ni,u!
, 1so·
. usual meanings, the INCORRtci
r:t have th err (
((3); 90• .
. er configuration, if a. and ,., 20161
rnmon errntt . . p
3 For ~ co . between a and ~ rs . (2) a = - -
relationship 1+ P
~
( 1) a = - 1 1
1-p (4) - = - +1
3 f a p
2

( ) a = 1+ P er the following time graph, the gate

4. If a, b, c, d are inputs to a gate and x is its output, then , as p (2016)
is :
d

b ---

a --------'---
x
(1) AND (2) OR
(3) NANO (4) NOT

s. (3), (4): the semiconductor devices whose characteristics are given below, in the order (1), (2l
ldenlify

I
dark
I I
/ I
----t-----+-➔V Intensity
of light
(a) Illuminated
(1 ) ZenerdiOd s· (b) (
(d)
(2) Solar ~- •mpJe diocte, U ht d c)
(3)
(!l
Zener ':~~9:
dellendent ~ista,:'1ent re~istance, Solar cell
Simple di~ Z lar eel!, Sin,ple diOde ,L' e;er diode, Simple diode
' ener diode, Solar ceu' L~g dependent resistance
' 'Qht dependent resistance
 .. , ..._,,_... n;:> 1uncbon electrons d ttuse fr
u-ave' across the Junction due to ocn n-..eg on to P·r
(;OOC8ntration m n-reg:on ,s more PCJtent at d 'le ~ <t':'\ beca~.
(2015)
in p- region attract them as OCXripa•eo to lha
- ~ move from n to p
..-·--
rea•on and not the v1....- P..ren ~n
~-¾ersa
.•~ to emrt light m v--tStble region of electrn
fllJ'.iP"' s
_,.. d
magnetic Lg._.
''\. t Shau d ha"'"'l/e
--
e '.Jiband(lap n
fl,ltoO~eV (2
8 eV ) O.S eV to O8 v (2014)
eVto 0 (4 )1 e
.7 eVto 3.0eV
.,,_.rd t,tased diode connection is:
1111 ~~ {2) (2014)
~ \ \ \ I I , -~\" (4 )

er A,-- diode is connected to a battery and a

6) falCI 115 st,own below: The currents I, lz and IL
,,.,espeaivelY
t) 15 tJtA, 5mA 10 mA
(2) 15,nA 7.5 mA, 7 .5 mA
(3) 12.5 mA, 7.5 mA, 5 mA
{4)12.;5mA. 5 mA, 7.5 mA (2014)
e
}
M .,.,-n transistor has three leads A, B and C. Connecting B and c by moist fingers, A to the
lead to an ammeter, and C to the negative lead of the ammeter, one finds large
.-~in. Then, A, B and C refer respectively to :
, base and collector
1.ft·,c,1C'ali-.- (2) Base, emitter and collector (2014)
Jector and emitter (4) Collector, emitter and base

5V
two npn transistors as shown in figure. If 0
na;parlds to false and 5 volts correspond to
output at C corresponds to
B A

B
 . . of an U~D is
n,e I - V cnaractenstiC .
12. a-- - (2)
0 V
(1)
y

(4)

R
(3) y
G V
0
B ----

A diode detector is used to detect an amplitude modulated wave_ of 60% modulati

condenser of capacity 250 pico ta_rad 1n parallel with a load resistance 100 kilo ~n by"~"
13. maximum modulated frequency which could be detected by 1\. h111. Fin; g;
(1) 10.62 kHz (2) 5.31 MHz ",
(3)5.31 kHz (4) 10.62 MHz

Figure shows a circuit in which three identical diode are used.

zo.
14. Each diode has forward resistance of 20 n and infinite backward
= = =
resistarice. Resistors R1 R2 R3 50 O. Battery voltage is 6V.
The current through R3 is (2) 100 mA
(1) 50mA (4) 25 mA
(3) 60 mA

Which of the following circuits correctly represents the foll owing

table? . truth A B
15.
0 0
0 1
1 0
2
1 1

(2)

A ----.J
(4) ...
C

e i"'J)Uts of a NAND gate. The cornbinati0'1

gate ~
 A--.f~'"1"'- ~
~

u~9=>- J -{~x
nn trans,stor v11th ,ts lhme eg ~ maP!.-...
.
·~ P (2010)
..-.,'i!;.J ..:,
A wv- -- ~ , 5 ~ound between P and O o
.i/' 1" ~r to R and tt1e o th er (posniv ) By r.onnectm;!'lTJ R t

"
.vi 111eter Which of the foHowing 15 tru: f~"rrn1n:z to p
· Jrl l"lpn ti:en@stor w,lh Ras base
!
~ - , n ,.
8
r the t~ansistor'? 0, or, 1
' 1 .! 8
pnP transistor with R a s emitter is a
(~) 11It is
(2) ~np trar (2008}

fflt? oircuil below, A and B represent lv npn lr<c!.,

,.,..,.,,,.nis the o:,tput. >"0 inputs and
,..replc:f.7" A
~ orvi,!'l represents
4.,

·~- NOR gate

.: p.NDgate
3
NANDgate
\4)0R gate
I.
B
r (2008)
If in a p•n junction diode, a square
inpUl signal of 1OV is applied as
snown -5V
5JV 1 .
:I .
Rl

Then the output signal across RL will be (2007)

(1) 1n (2)
-1li
(3) _J_f (4) +Tl
Carbon, silicon and germanium have four valence electrons each. At room temperature which
one of the following statements is most appropriate? (2007)
(1)The number of free conduction electrons is significant in C but small in Si and Ge.
(2) The number of free conduction electrons is negligible small in all the three.
(3) The number of free electrons for conduction is significant in all the three.
(4) The number of free electrons for conduction is significant only in Si and Ge but smalt in C.

Asolid which is transparent to visible light and whose conductivity increases wilh t e m ~
y (2) Ionic binding
·c binding ( ) van derWaals binding
4
t binding

·• in)-Ph '"scs
r.1:tt1:MIJaL ·
 t is 5.4 88 mA for an em .,tte
:. i . . - ·stor r11e c011eotorf curren(A ) ·11 b
. . .. r Cu
'fv\..t of a m~n 5i 8
1

n , rren ' am plification eCI Or 1 WI rrerit ()f

i ~ ::or'rll>ft:"! Nl~ (2) 49
me oas e ' (( 1
z. :.• 5 :.;t..
Tht? \ -,~ue of. cu
s1
°os
•' v•4£ (4)
•
-r~ -·
.;- . St: Con duction ban d wid th ,:- t"- E:c

~>is :atoce C'()(lS-tant of tt1is Band gap

ti
sermcond{Jdor is decreased . then Valence badn wid th
7777
~-,:en of !he fofJawing is correct?
(2) All Ee, E9 , Ev increa se
inc reases
rij All E~. E,:, E, decrease (4) Ee, and Ev, dec rea se Eg
ses
(3i E,. and E. increase but Eg decrea
33.
In the to/lowing . which one of the
diodes is reverse biased?
26
+5V

R ~+10V
(2)
(1!

+5 V

nR
35.
(3) (4)

-sv - -10 V
27. The cir"u 11 as two o
n· . .
V .
.
PP0s1tely connec.t I'dea/ dio 36 ·
parallel. What i des in 4Q
currem followin
s the
. 9 in the circuit?

12 V 2Q
l1) 1.33A
(3) 2.0Q A
28. . (2) 1.71 A (20 06) 37
l"he electn""' ( 4)
Wa· "QJ CQ
I
2.31 A
\1/~•en~th short nductivity of
(31 o· 1e..; er than 2480 a sernicond
' 5ev nm is inc;d Uctor incre t
ent on it. The bases When ele
(2) 2 aV nd 9ap in (eV)cf romagnetic radiati on of
.
or the semico
·5 e nductor is
(4) 0.7 ev (2005)
.·. 31
 ~-· ~-- _:: ::- ..:: --- ·-- -·.. -- .
•u• ,vp,.
• vc rccu
_ne r cir cu it op er,•t- : - =
•
==,=_.- ~
"' ing f _
Ii' µ '. . 11(1 v,i<)Uld l) S --=---
'"'' ,,PP' "
' I co
; J'.) 10(1 Ht
· ·
rom 50 Hi

(2)
mains ft
4) 25 Hz
=- --
- = =- ===IW
• su ency th
, e fundam ent al f -
,,, ' v,<)(.ltn on ba se amphf,e 1 reque nc \
1 -1 r, the pl ,
las e differ e 70 .7 H
vL',,,ta19e ~ z -Y "
, I; 1
ne e bet... (2005J
\ !, 4 u, ee n t"-,1e .inp t .
(2) n u s,goa1 v
oltage and output
(2005)
·1) 0
\· (4) ~
vvhen pn transistor is 2
11 used as amplifie r
1) electro ns move from
i :' )11 electrons. mo ve fro m ba
co
se to collector
tte
I - .. . cto r to ba se (2) holes mo
(4) holes mO:: %om em
(2004)
for irans1stor am pli fie r itter to base
m co m mo
, , ,0 50 an d ho, -- 25 x ,o -' _
n emitter - om ba se to em·tt
(1) - . n ) the cu rre nt ga.in 1s
_conf1gu ralion h avi.ng loa ' er.
1 d .
242,8
,JJ - 5 imp edaoce of 1 k<I
15
(Z) - .1
(4 ) ·-48.78 (2004
A piece
)
;.~stancof co
e of pper · and another of ger .
( ! each o ern inc re as es ma n,um are cooled fro roo m tern
DOG) m
f th
1 each of the m decre
(2) peralure to 77 K. the
ases
·3) co·pper de
1 . cre as es an d ge rm
anium ·ncroa 1 (2004)
(4) copper inc rea se s ~s
an d ge rm an ium de cre
as es .
TM n,anif es tat ion
. of ba nd. structure in solid 1s
(1) He1sen er gs un ce s · due to {2004)
(3) rta
· Bohr' s correspondence y
b int princ ipl e
pr inci ple (2) p .,
,, 4) 8 a'u h snaexc
o 1tzr nnlus ion pn nci ple
s law
vvnen p~n jun cti on dio de
1) tt,e depie l~on reg~on is fo rward bia sed \2004)
~s r~ du ce d and barrie
1
(2) the depletion region r heigh t is increased
1s wi de ne d an d barrie
3) both tt1e de ple tio n r height 1s reduced
re gio n an d barrie r he
v~i Mt h tt,e de ple tio n reg i on
1 ight reduced
an d ba rrie r heigh t inc
re ased.
foe tMrrn ist or s are us t1004)
: 1l me tals with low te
ua
lly made of
mperat ure coefflciont of
,2' metals wi th high tem resist 1Vity
pera tu re coefficient of ros
di met,~ oxides w1th high istisity
11\ som,conducting ma tem perature coefficient
ter ial s having low ol res1stJV1ty
• temperature coetf1e1ent a!
- resis1.v,1y
,''~ o,:le rence 1n th e
· · mela' -v ' a se1r ,,-'lll""' c"'
vanetiort of resistance
with temperature in • ' · · ''"
1 0 1
,v-,;es essentiali y due to th - - ' ·, :;( ) ;,
e difforenco in the
i. 1'i crystat structure
<'' 1 !ffiat1on of th e numbat of ch arge 81
carries with tem P8 ' "re
, ·1, f .' -. 4 , $
,... : •)!--"' ' Ot oo n<i1ng
' : vsi,°at
I..

,on ior ,carteti ng rnecnan,

4
,., ,,, . sm \'/Ith tenipersttlf e · (1JJ03)
tM
,; '" ' ,,:,dd!e of the depletion ,blas,,d p-o 1uoclOO,.1
layer of a revers& ' l ,Vt
"l . . .
;.-_-''·' tent1a' 1s 01ax murn
- ~
. .
\ .. '<':ne i,e1d 1s z.ew l-'41
I \ "',,11-r• · ( t
, po\eot1;;\ 1S ie{O
-. -.; _• \ , .,ti1 G it~'?·.ol 1s rriaxunurn .
 . . ·
rie s is ' 'L , the n the s . ue nc y o f th e
Pfund
ue nc y o f the Lyman se e n e s hm,t fr eq (20 18)
limit fr eq
., ,re ,eneS . (2) 25 VL
(4 ) \'L/ 16
;,11e,·_s,~~.. it r d ' r·
~i 16 \ L
s o f hy dr og en atom em a ia ion tto come to th e ground
e xc ite d st a te ectron in the
th
the gr ou nd st
ate
l''
from vanous 8 1·1e wavelength o f the el n sta•t·e and
-'ectron• , , be the de rog in the tr s1 ton from the nt h st ate to
An t;;l • n g th o f th e emitted photon an
' .\ be the wavele
te Lei 1/.,.,, Le ts ) (20 18)
t • a re co n st a n
stB
eY ' r large n, lA B
Fo
e~..,.,ectt\ d 5 tate . (2) ,-\ ::::: A +An
8
~
·he grcun
. \, ::: ,.
i 1) (4) /\ n
2
::::: A + 8 ,...2n

e figure.
m o le c~ le ar ~ s~own in th
vels o f a e n by: -E
Soff'e en ergy le v ele ng ths r = A1lt. .2, 1s giv
e wa 4 . A2
The ratio of th ) r=- 4 ......... ....... ......... ... .
(2 3 E ...... ......... .........
...
1 --::;-
.)

(i')
r = -3
3
(4) r = -
4 -2E

-3E
(2017 )

ich is at rest
p a rt ic le B o f mass m wh .
with a
in iti a l ve lo ci ty v collides 2
to t1.s a ft e r the
mass m and avelengths ''-A
A pa rticl e A o f ra tio o f th e de-Broglie w (2017)
st ic . T h e
d ela
head on , an
The colli sion is
colli sion is:
' 1
(1) AA =-
)._8 2

(3) "-A= 2
to produce
''B
to hi t a m etallic target
difference V lest poss ible
ra te d b y a potential s. If Am in is the smal
am is a cc e le ristic X -ray esented in :
5. An electron be o u s a s w el l as characte ith log V is correctly repr
u w
d u ce s co n ti n n o f log Amir.
, the variatio(2)
X - rays . It pro e sp e ct ru m
-r a y in th
wavelength o f X
(1)
logAmin
logA,ru n ,___ _
log V
log V
(4)
(3)
logAmin
logA,nin
r (2 017}
log V
lo g V
t
I
i

@it;: i,~ =II §#1/DW a:

i
i't1 t i1
,.f
 . . ,, l

--- :.,.--:::--~...,::.::::::::= ---· -- .... -

1J11Dw
~=--....:---
: f:==== . :- --...:::==- - .,. a nucleu" f3 . fa,I t • () thf,,,
·ays ll 110 • -'' '} 1•
'th 2l hi:)lf nre r . <)e:1t1a1 of A lf) o..1. Th6n , t It-: giv.~n !;<,; • f F. f ,,,.
1 -~. .
6. A radioa ctive nucie,;s A WI . ;mncr of 8 1 lnq2
h • tlo of !t)G nt (2 · I {• '
At sometim e I, f 8 ra ·J 2. lug 1 3 .r,-,. .=1~
(11
'T
( 1 > t "' 109<1.3) (4 ) f T!()g(1 Z)
~) · f il
log 1.3
(3) f "" T · · ·· - ·
log 2 i:l photocell . The fa i,teet (}milled ~,(~r:t.% r
0
. .s mcident on . i-; ~: ~:e,.
Radiation of wav elength ;., , 3A . eed of 1h 0 fastest erri1tted e l1z:ctton Will t.14'.: x-.,: ' .
7.
d to ~ the SP
the wavelength is chango 4 . 1 '.a,,,
1 (2) ,~ v(i J2 ·
( 4 12
(1) < VI_···; 1
13
1 (4) ,, v(-t)2
(3 )2
(3) == v , 4)
' .; radiations per quantum in th e order of incrr;a.,i
. electromagneuc - n~ ':r ► •
8. Arrange ~he following 8 : Yellow lig ht (:! .
A : Blue light D : Radiowave -lit ,1;
C : X-ray (2) C , A, 8 , D
(1 ) A. B, D, C (4)0, B,A.C
(3) B, A. D, C
. . . elements A and B are 20 minutes and 40 minut~ f ' .
9. H~!f-llves of two rad~~~~i~equal number of nuclei. After 80 minutes, the ratio of de~1'/:¾.~:,:; ,
/n,t,ally, the samp1es cJ r'J.r',.

of A ands nuclei will be : ( ) 1:4

2
(2!l{(
(1) 4 : 1 (4) 1 · 16
~)5 : 4 . . :Ti
As an electron makes a transition from an excited state to the ground state of a hydrogf:<' _ , p
V 10.
atom/ion: {~ ; n
(1 ) kinetic energy, potential energy and total energy decrease t,-., {l
I
(2) kinetic energy decreases, potential energy increase~ but tota l ~nergy rem ains same \
I
(3) kinetic energy and total energy decrease but potential energy increases . \
(4) its kinetic energy increases but potential energy and to tal ene rgy decrease

11 . Match List - I (Fundamental Experiment) with Li st - II (i ts con clusio n) and select the CTJr':. •
option from the choices iven below the list: (201:
List - I List - 11
Fhratnck-,Het~ Ex er!ment ___ji)__ ',~==;-:--P_a_;rt~ :::.:t::::
__ ic:..:..:le~ na re'.....:C!l1·~h~-
u:..:: -
P o o-e ec nc e~ enment ---1..._fii. , , Discrete ener· y level s of a1om
1.:~
0avison - Germer Experimen_~--------·r-::- :. :~oLf_:_e::.le:..:ct~r::.o~n~ ~ - -
;". v:~~e-n-a-:t.:u.. :. .re
~T'a
ii i-L---~::_w
19.
({f-
(1) - (!!) (2) - (iv) (3) - (iii)
Ji~)__ S t!:_l}fture of atom
(2) (1) - (! 1) (2) - (i)(3) - (iii )
(3)
(1) - (!v) (2) - (iii) (3) - (ii)
(4) (1) - (,) (2) - (iv) (3) - (iii)
12.
ge-BroJlie wave~~ngth of an electron ,, ··
(1 ) ~-o5~~-1 x 10 .31 kg, h == 6.6 x 1o·34 1i;elerated by a voltage of 50 V is close to (\el=1.6i €.
(3) 2.4 Ao l201
(2) 1.7 A0
(4) 1.2 A0

Ae=Uit!E
 \

'
t '1 o
/) /J r I
-•t)
,.....,,-·1 : ·I' -~
t

(201 4)
d .
sh o w s A Woaoe
a re c e n tl y c u t tre e 2 0 e c a ys P e r m,nute. n P iece of sarn
e
fr o m e e cu t 2 d
of w o o d
ta in ed from a tr
Years back
) sho w s
Perem,n ute . Irnha".ll
e u m (o b f I e cay m u s eur '
"'!:ce d in a mu s th e n th e ag w o o de n Piece Pace(! In th
A "' 5730 y ea
rs ,
e o the (2014)
s. ze P C i .r, is rs
, ooxf_
:,1,1!',w I . 4Y
(2)) 319300499 eaars
ye
m9 ,ale
e ay.
rs (4
"
43 Y ars of h d
;,;,, 19039 ye
10
~ 2 transition fa// l surrace to
n d in g to 3 Y roge n atom . s_on a meta 4 r If the
c o rr e s p o ter 3" 0 1
-he ra diati on a re made to enns i! ~agnet,c field of
T h tr o n s
ese elec ed by these electro nct,on or th e
e
/
e c tr o n s . ll o w .0 m m , lhe Work fu
len -- lik e to fo
,oduce pho rgest circular path
- 'J .

(2 01 5) s o f th e la (2) 1.6 eV (2014)

!d iu
cl ose to :
l is V
metaa e (4) 1.1 ev
r1) a. L"' ••
t3) 1. 8 eV 1 2
is e d H e
and do ub ly ion iseo IW
lium (,He 4f transition from = 1
t,urn .1 ) i
3 , . If
io n n
1
u te ri u m (, H ), s in g ly . Consider an electro a p pnroxi m
2 aoten!), Which
) , De
Hydrogen ( Helectrof n around the n
u c le u s c ti vely then
,, l. and A4 respe
co rre ct all have on e h d.1at1· on a re A ,, A 3 (201 4)
0 1 5) _ co·trrteedct?
ra = ,
g 1s m ,
=n, = 4).

--
(2 fo/n1gotwinso . e 3A
-- = t. .. _
the
on eo vee le
wfath (2) A, 2A, 2A3, A,
= =
(4J ;_, =
, =9"-44
==n 4l. uclel/s.
(1/ i1 = J., 1.,,
(3) 4!., =
2 , = "- at a constant rate of 100n
g prodnuucceledi is
. _- )

nt O.5 /s is beinre so
cayth consmta e n there a
u c ith dcele
le i wo i, e ti e w h (2014)
e n
Aradio ctiv
a ere were n
If at I = Oth
n u
(2) in ( ; )s
_
/1) ln(4) s
(4) 2/n(i)s
roglie
expe enta lly veri fy the de-B(2014)
: 1 0 -19
' 20.
1
(3) s
particles w
ill
d1ff1cu
it b e m o s t . . I
t to rim
fo ll o w in g
J15) For Which o
f the (2) a proton
?
relationship on article
electr (4) a dust p
( ) an a-particle
(1
an ·
3)
ain)-PH
HIVE.JEE(M
.,' '.
 k:::--=====:::.·::::-=-::::..._--==--~
-...- ~
to apply Bohr model to a partick) of ~ ---ll:IJ
10,,.
;nfttJ .
"";'::e of a magnetic field 'B', the energy .:I'~~.'.:'.rarged
1' all<l <ll'.arge ·q•. . .
\A p~ l'll0<1;~ In
rt{ .
hQ~~l
t/1? t /

ar.rn ,j
\11 ·nri, --- n , 4nrn----J
(2) . ( hqB . d
"'
1ae in the nlh k~ef l~lal ~ UntJ&r
U1:!

,
1

__.
13l fl"[,__21rrn
M~), (4 ) ( hqB
itrTI;
r, --- l
(2015)

l· . of b{Jne o! an animal from a ruin is f~und to h

A piece r gm of ,ts carbon content. The 1"c activit av: . ~ activity of
14
I ..
rl
d
111;nut• ~r gm. How long ago nearty did the animal
fi1in~:~z years
i :(' •.
12
ln,1ng aflimai i• l••,rtegrattons /J€f
1
(2} 23~ 1(Given haff life of 14c i d1smtegrat1os per
l (1} i 6 1 rs . . Years s f112 =:5760 ye~rs)
(3) 329 yea (4) <1453 Years (2014)
t
l of light has two wavelengths 4972A and A .
',.'"1. A~; distributed among the two wavelengths. The
6216
tiea::'t •
Iota! intensity of _ x ., .,
equ metallic surface of work function 2.3 eV Assum th' alls normally on an area6of 110 r✓m
t 3
t
t ciean · bl h t · · " 1e at there is cm of a
and that each capa e p o on eJects one electron. The number of no Ioss of light by reflection
! .IS annroximately
,,,.. 11

\'1) 6 :( 10 1' (2) 9 / 10•i

photo electrons liberated ~n 2s

(3) 11 x 10 ' (4) 15 /. 10•: (2014)

Apiece of wood from a recently cut tree shows 20 decays . . . .

size placed in a museum (obtained from a tree cut years b~ ~ute A Wooden p,~ of same
14
,,1fe of c is 5730 years, then the age of the WOOde-n piec ~,.i decayper mmute. tf half 2
" ximately: ce ~acec in the museum is
appro (2:014}
11) 10439 years (2) 13094 ye13rs
/3) 19039 years (4) 39049 years

The radiation corresponding to 3 ➔ 2 transition of hydrogen atom fans on a metal surface

10
oroduce photoelectrons. These electrons are made to enter a magnetic field of 3 x 1041. If the
radius of the largest circular path followed by these electrons 1s 10.0 mm. the work function of the
metal is close to :
(1 ) 0.8 eV (2) 1.6 eV (2014)
(3) 1.8 eV (4) 1.1 eV

Hydrogen (, H1). Deuterium (,H\ singly ionised ~ehum (iHe\ and d~b!y ionised_li~um ~!!ft•
all have one electron around the nucleus. Consider an electron transition from n - 2 !O n - 1. If
the wave lengths of emitted radiation are ,.,, t., , i.3 and i-4 respectively then apprnximatefy wruch
ooe of the following is correct? (2014)
'1' . . 4·· g· (2) ,. , = 2).2 =3 ~.3 =4 ).4
\ j J. • -::: /.. 2 ::: A3 = l.4 . - . : 2j = )...,.
,-.1 } 4·I t -2·
(l· - 1-2 -- 2' .,
./.3 -_ )...i, (4)1., -21.2 ·3

. od ced at a coostarrl rate oi iOOnudeiis.

Aradioactive nudei with decay constant 0·5/s is being P~ n~dei is
if at t:.: 0 there were no nuclei, the time when there are; , (2014}
4
P) lrt{4) s (2) 1n1- ,s
, 31
( 4,'i
, (4) 21nl -- is r.
·3; 1 s , 3. verify the de-Brog,ie
It to e.x.oerimental1Y
i:• 0r
Which of the followmg partides · it
wiH be most diffcu (2014)
·
;~e~-ont)tup? _ (2) a pwt.on . e
'.} an electron (4 ) a dust paruci
.. , an u--p.artide
 .
torn is 13 .6 e V , th e en er gy requ
·dro9e n a ·. ·
. on ir a tw _... is: ,, E:t j t--
'f .. ,. b-}rid•.na ''J of tn e eiec
tr stale of LI
30 6 e V IJ r¾
21. ene gy
1 me
· ·
•·h e:- fl J ~ o n ..,
~
,-rorn the hrs
t e-x oted (2} ,
(4) 3 . eV
4 ~,.
lfl v
11 , 12 2.4 e' J ' l<t,.
. I
V energy le ve I ·th \~
,..
.i1,.,.', i3 .o e •ti f 111 an w, quantum ~
tr.gnSl on ro en cy d ' f
' -n f11 l,es
8" 1
1 ' th 8 freQU
o f ra 1a ,o n .
err11t t'll.Jrn1.. ·
ted is P
... m el e{\1 '
7' 7
ln a 1•Y d..n.,-.1:,r,, .en 1txe ato:
1.1~
22 . ber (n ~ If n
~n • • ) ral"I~ tq.
~0other vr.tt1 qu t rn rtlfT) i t-'\lfti~ ·.
an u . ) -.-
1 >r,
(<~~
~ (2 n 312 1;,
1
( 'I) .. -- 1
n; 0);
,
; 3) "
th t>. o f the lig
n d The wa velen 9 h t falling on th
r11e anooe v~ta9: of a pn oto
cell is Kept fi)(;the
•rrent l o
ne
photocell va s as follows: ~ Cath.
·~ ~
23. ,e d rne
is gractu al lt cha! p1 at
e cu \ic,i:l
i9 [
I
1i
i· r----- (2)
1
l\
;
' 0
() ~
"--

(3) ~
1 \
(4)
1
I
~ 0
OL · -
A
, d I of hydrogen f between th e
24 . ln the Bohr s -like atom the n u cl e u s and
mo e orce the electron is
modifi ed as
e2 r 1 , ) whe I
F :: - I2 re p is a consta F th· atom the ra
4;n:0 \ r 'T' r 3 nt. or ,s d iu s o f th e n th
I
' orbit in terms of
• the
Bohr radius I a
(
0 =~
£o h2
) is ·
I. .
\.. mne (2013)
(1) rn = a n - ~
0
(2) rn = a n 2 +
(3) r = a n2 - \)
0 0
0 ~
(4) rn = a n +
25 . 0 ~
Elec.irons are acce
lerated through a
potential differenc potential differe
e 4V. The de-B nce V and pro
roglie wavelen tons are acce
gths are Ae a lerated through a
respectiv ely. The ra nd Ap fo r electron
tio of ~- e is give s are protons
n by (given me
AP is mass of electro
\'1) ~~ -·
n and mp is m
- /m
- -;- ass of proton).
i,p ~ me

{2013)
 element A is the sa me as th
;{ of a radioacbtivte e mean - /ife of an
. .
ff - Ju e ce s ha ve the sa m e n Othe r rad1oact1 ve
. e 11a Initially both su s an ra te alw ay s_ umber of atoms, then
cay of the same
~ ~ent BB is both de initially. (2013)
y at the same rate
~) ,Aafld 8 will deca tia lly ·
ster rate than B .ini
( ) p. an"I'ddeC8y at a fa A ini tia lly .
{2
'2) p.. WI' deca y at a
faster ra te than
l., f3 will •
. . .
(-1 )
in a cir cle are such tha t th orbit equa ls a . t er
article moving rticle Fe Penmeter of the n in eg
s of the Pa
of af dp e-B roglie wavelength · or a cha rged Particle moving in a plan,e
Ortii! S . fiie1d, the radius of the nth b.ital Will the f
r o far to a magnetic or l to
.·/. nu1 111b e .
(2) n re ore be proportio na
,d;CU (2013)
perPf (4) n114
(1l n1:2
13, n orb ·t
moves in a circular the
BOhr model an electron I around the
proton . Considenng
· I current loop, the magnetic m en ato , en
m wh
the
1n 1. 1. electron toth be
a c1rcu ar oment of the hydrog
t ngctron i·s in n ex
cited state , is .
orb ele
the 2
(2) ( ~ J nh
( e
(1\ im" 2
]!0 m 2rr
2
(2013)

(4) ( ~ J n h
r e ) nh m 2rr
(3)l2m 2rr
ture) , that has the
tru cte d
_ fro m _th ~ basic constants of na .
the quantity (cons gnitude vis-a-vis typi·cal atom1c . . 1s
29,
From the following, as co rre ct orde r of ma. '
size,
. nsions ' as we ll ·
dime (2) 4m:oh2 (2013)
e2 ~
(1) ;;some2 2
me
2 (4) 4rrs 0me
e2
(3) 4ns0b
2

n reaction can be
utr on s, it un de rgo es fission. The fissio
mbarded with ne
30. When Uranium is bo
written as
92 + 3x + Q(energy)
u2 3s +o n1 ➔ss Ba 141 +3s Kr hat is the name of the
92
ed an d en erg y Q is released. W
named x are prod uc
Where three particles
particle x? (2013)
(2) a-particle
(1) electron
(4) neutrino
(3) neutron
ergy 11 keV each . To which region of
31. electr om ag ne tic radiation has an en
Photons of an
trum does it belong?
electromagnetic spec (2013)
(2) Ultra violet region
(1) X-ray region
(4) visible region
(3) infrared region

I~ A copper ball of radiu

s 1 cm wo rk
e effect of irradia
fun cti
tio
on
n
4.4
res
7
ults
eV is irradiated with
in the
ultraviolet rad iation
em ission of electron
s fro m
value of the potentia
the
l on
ba
of
ll.
the
wavelength 2500A. Th an d du e to this there will be finite
quire ch ar ge
I Further the ball will ac d by the ball ls:
ball. The
(1) 5.5 X
ch
10 -
arge
13C
ac qu ire
(2) 7.5
(4) 2.5 X 10-llc
13
X 10 - C
(2013)

(3) 4.5 X 1Q · 12C

YSIC
RCHIVE-JEE Main -PH
 · In an experiment on photoelectric e(feet a student plots stopping
33 potential v, against reciprocal of the wavelength l. of.the incident v, ""'• ~
light for two different metals A and B. These are shown in the figure.
Looking at the graphs. you can most appropriately say that:
I1) work runction of metal Bis greater than that of metal A
(2) ior light certain wavelength /ailing on both metals. Maximum lt,,
. u· of electron.; emitted from A wrll be greater than
kme c energy ~
other emitted from B.
(3) ""rk function of metal A is greater than that of metal B.
(4} Student data is not correct.
A . eV electron t,eam is used to bombard
. . hgaseous
B I hydrogen
. at room te mper
34. ( )12 5;nes in the Lyman series and 1 line ,n t e a mer senes atu,,. It,·
1 2I
(2) 3 lines in the Lyman series . . ~\1
(3) 1 line in the Lyman series and 2 lines ,n the Balmer senes 1~;
(4) 3 lines in the Balmer series '
. · After abSOrbing a slowly moving neutron of mass mN (momentum - 0) a nucie
35

-
breaks into two nuclei of masses m, and 5m,(6m, = M + mN), respective!

(1)A
(3) SA
(2)25 1
(4) )J5
us or~
wavelength of the nucleus with mass m1 is 11., the de Broglie wavelength of thy.e othe
If the de o~
·~ ~
ias~'
~~
I~!

36. Statement - 1:
A nucleus having energy E1 decays by p emission to daughter nucleus having e
1
(20
~- rays are emitted with a continuous energy spectrum having end point energ ;ergy E, bc, u,I
Statement- 2: Y ' -E,. ,
To conserve energy and momentum in Pdecays at least three particles must take .
transformation Port in 1h,
(1) Statement -1 is true, statement -2 is true; statement -2 is not correct expla . 0
statement -1. flafi~
(2) Statement -1 is false, statement -2 is true.
(3) Statement -1 is true, statement -2 is false
(4) Statement-1 is true, statement-2 true; statement -2 is the correct explan ati on of statement -I '

Energy required tor the electron excitation in Li++ from the first to the third Bohr orbit is .
37. (1) 36.3 eV (2) 108.8 eV . 1~11:
(3) 122.4 eV (4) 12.1 eV

The half life of a radioactive substance is 20 minutes. The approximate time interval (t2-i.i
38.
between the lime t, when ¾of it has decayed and time t, and i of it had decayed is: (2~11

(1) 14 min (2) 20 min

(3) 28 min (4) 7 min

fH-4: IM:8I33'1.'nf.l'f
 ,,.,.. .... ~ St~t ~n
.
• ·s- . ;;;t"''
u1.ti"· " cr, " {- , en i -· -, "' ,.__ ~ -. ";: ·- - ··•
t.iOS~ \h ~ on a no s ·.- · -~
.'flt th,:it t)\}S\...ch . •-
: '1~ ! ' ~'! !S
. , ·. -=- ~:-- __
, tu " l~ \e.r,,
t-1 .If ' t)1,
#' '~ ~ .A. ni ~ ic w rt nc1.) ,~ ~ SCtibt•~ t 1
-~
.. -,· ~,,,;_f'rt.;,Qil'<- , •} Th , irr n( ll~ " I \() l\lvQ • ~ 0 -~ -
•.
_..,.1:1"- ' ~ • ' -:;iJ'tc-) • (; mn J1
,
:1n,\.lf\) '1....11 . ,\l ~d h t lh l1 1 --- -~-::...-..:.;::::--..
tf f . . l Y ,•l<1l t11n
; ~ j t"\" ttl e re qu an cy nc \u lta t1n • a r1i on · l\f \t" O\J r • =::
_,.._..,. . ., d'i'Y ictunt o1 ~l' llY tln rj OC hr 1.> · C:h o1ct1 s . :.._~__~
-t~:~ ,- - ., : ~ . , I h o i!ll t1'1ac,.,, fl\ fllk Ii h , Q1v1.1n
1n.sx11nltn1 ki ne , u, o 81\er the
• .--~ ,"-- tic f.'nor " c ciub stopping{ l nl f to n ll,,
,.r, · _;, ,. ""1
.U ) P I -,. (201 ")
~..1na-,::-e RM . .101.1-, , ep
:- i'-' d . d lcl<l. bo th I o on "n cy v
en 9Y onc :1 lh 11a1 '
. ~., ?:i i. . .•,,nt- t is tru S t-} nt cm th e sto ho
Or a .,. Vo {lhe
~ \ 51 -~ ~; t- 1 . ~. ta tl: }m en t-2 l o fr eq 1 np \ K
"'" ' nnc1 K,
. ie r,cy of•· Inrig potim
i vo..,, af1cl \J o
' ... t~ ~
. - •.,..
. s tru o; Sta1arne~~ ua , of ar e 1
.~.., ~ - t a so
-l~~ e •·ll- 1 ~s ud tl, ,:n a em ent--2 'S t · . ~n1_1;g~,t. Photo
-1 ~ •• Q\uctrons erri"
., . d5t@"l)efi - 1 t • · • c. IS \h
:_
I lte ; St e co tlte ct
I
~• .,.p(\t - 1 ~::. ta,s . aten,ent ..., rra ct ox
e. S ta te m en t-2 •
p\a na Uo n of
-5'-~ ;~ ~-t-1 is tn.ie is tru e • ,:_ is no
t th e
. St at em en t< ~ is co rrect
f ~ "'" fa ls e. explanation ol
' nt- i : W hen uttra
~ ·!O.nBtic en e~ Y
viol et lig ht is in
ci dent
-;--..}}--'1~~ V- an of th e ph ot oe le ct 0
• ~ d K. -.....'U incr e_asrons is n a Phot ocell , its sto
. '·' e.
:-s>s~
. t~ : P ho to ei ec tr on K max- W hen th
p in
e ult ra p g Pote
.
st.sl . of tne ra ng s ar e emitted nl! a\ \s Vo and th
e of wi th s VIOiet lig ht .
~ JS B fr eq u en
ci es pr es e nt in e
ent- 1 is tr ue , th P~eds ra ngin is re placed by X-
•l sratan1 Statem en t-2 is g
t ~ incid ent lig
from zero t
i c;:tatenlent- 1. ht. 0 (2010)
ru e. Staternent-2 a maximum value
_._. ~ tainent-1 .
.;.. · ~ t-1. is tr ue . S ta te m en t- ,s th e co rrect ex
2 is tru e; Stater planation of
nent-2 is
~ nt -1 is fals e, S tate m en not the correct
·" 1S te1-t1 " ..,... t-2 is tru e . explanation of
J ..,...r.,er,t -1 is tr ue
, ~ St et ,:;, £•
,- ... , St at em en t- 2 is
{2(}1 2) false_
bu t tre . . N~xt M O Qu es
tjo ns ar e base
'"lf.1-~ S· d on th e fo llo w in
• ,..~ ,, Ol.: mass M + ~ g paragraph .
: -...-'4 .....~
' is at re st an d .
de ca ys in to tw o
the daughter nucle
i of e
quaI mass M
- each Sneed
2 . t-"
ation :/ i":1e binding en er
gy pe r nu ci eo n
~ fo r the pa re nt
nu cl eu s is E1 an
d that for the da
:, F - 2£ · ughter nuclei is
1 ,· E 2•
: ; - 2 -, .. '
·- "' E2 > c ,
(2) E1 > E 2 ~~
1en t -1 (4) E1 = 2E2
i ~,~ soeed of da
, , fe V
ug ht er nuciei is
(2011} {2010)
(2) c✓ :' 2

:; . r ·: -
•·Jm jbm
' - t. } ,.i M (4) c~~
,
W11) Arai ooetive nucleu . . . A nd atom ·t 3 -par
s (initi al mass nu
· ;cstrons. The ra tio mber at f protonic number Z) em, 5 o._ ticles (2an01
d2
of number of ne s in the final nucleus will 0)
utrons to tha O be
,' } A - Z -8 A - 2 _4
Z- 4 (2) z - 8
3'. A.: z - 12 A-Z-4
Z- 4 (4) -rz
 -1he abov e
45 . 1s a plot -'
~ b~'nding enerQY
. ·- '""'ar
· st the OUvt"
per nucieon Et-. again spond to
mass M ; A. B . C, D. E. ~ corr~ r tour
dtiterent nud et t,ons1
reactions: i\l
tii) C -➔ A + B + ti
(i) A+ a- C + f. (iv) F ~ D + E + ~-
(iii) D + E -4 F + s d ? . reactions is a positive?
wh ere f. .
IS the eno.n,v
" ' ~, release . In w!l1ch (2} (ii) and ~!~l)
(1) (il) and (iv) (4) (i) and (111)
(3) (i) and (iv) 00 Th k' ·
_ •th the light of 4 _ nm . e 111et1 c erierg
46. Th rf ce of a metal is illuminated ~ The work function _of the metal is (he :::: of lhQflj J
ph~tC:1e~trons was found to be 1.68 e . (2 ) 1.68 eV 24QGI.; n~~\~
(1)1 .51 eV (4) 1.41eV (<009
(3) 3.09 eV )
. based on the following par~g rap~ .
Directions: Next two Question~ ar~ that they wi ll show d1ffractIon effects .. Davisson an
Wave Property of electrons implies f crystals The law governing the diffracti on fron d Go
. .ff ti electrons ram · f . 1 a c 1111er
demonstrated this by dr rac ng es reflected from the plane s o atoms in a c,y st I rys1~11s
obtained by requi~ng that electron wav a interte~
constructively (see in figure).

Crystal pl:rnt•

47. El ctrons accelerated by potential V are diffracted from a crysta l. If d = 1A and i = 30-. v sho,J
e
beabout (h=6.6 x 10- 34 Js,me -9.1
-
x 10 _31 kg , e--16 · x 10-- '9 C ) Uld
(2008)
(1) 2000 V (2) 50 V
(3) 500 V (4) 1000 V

48. If a strong diffraction peak is observed when electrons are inci dent at an angle 'i' from the norm~
to the crystal planes with distance 'd' between them (see figu re ), de Broglie wavelength i-dll a
electrons can be calculated by the relationsh ip (n is an integer) (2008)
(1) d sin i = nAds (2) 2d cos i = n11.d
8
(3) 2d sin i = nAds (4) d cos i = n).d
6
49.
Supp_ose an electron is attracted toward s the origi n by a force k/r where 'k' is a constant and r ~
the
th d:~tan~e of the electron from the origin. By applying Boh r model to this system, the radius~
e n o~brtal of the electron is found to be 'r,/ and the kinetic energ y of the electron to bll T;
Then which of the foll owing is true? (200,
(1 )Tn oc: 1-/n2, rn oc.. n2
(3)Tn 'X 1/n, rn <:1. n (2 ) Tn independent of n , rn .,_ n
(4) Tn 0-.. 1/n, r,1 :x. n 2
 isotope -~ M
oxygen
me mass ' of thane nu . eO . : al'l(j M.., ar. e p-.',e rnassas of a proton and a
•· cie bi energy of " •S , Oio'""" ·s (2007)
,. 11A , ,s ar nding t,.e
y,
:(' ,-,.:,on respectrv2 e,
I
. 9A.A'N ;,c i
p,; ;

(2) ("-'fo - 8.\,\,

I, _ 6M p)C
- 17MN )C ~
') J

11:- if, () . (4) (~A

"'O
,;) M,~.,C' (2007)
from a nudeus
1-

aarnma ray emission r and th e proton

numbe r change
neutron num be neut
1tn
th the • th t number and the ron number.
1) bO e is no change ,n e pro on s
V

'. mer neutron num ber change

(Z) on/y th e
,.,) ges
l-' ly the prot
on number chan
(4) on .
ciated with ,· t. city of light, the
cy v has a momentum asso If c is th e velo
photo n of ~requen (2007)
mo m en tu m ts
(2 ) hvc
( 1) vi e (4) hv/c
' 2
(3) h1•/c anot her radio-
sa m e as th e mean life time of (
o-ac tive elem ent X is of atoms. Then
di
riod -~f a ra ey have the same numbe r 20071
Th e half- life pe lm ba l/y th
active elementyYfa. ster than Y
.1) xwill deca
ster than X
(2) y will decay fa te initially
x an d Y ha ve same decay ra
(3) always.
(4) xand Y deca
y at same rate (2007)
ph oton s of highest frequency?
it
ogen atoms em to n = 2
e follow ing tra nsitions in hydr (2 ) n = 6
iS Which_of th
(1) n= 2 to n = 6 (4) n = 1 to n = 2
(3) n =2 to n = 1 (2006)
ot on strikes is approximately
out after the ph -4 s
tim e by a ph ot oe lectron to come (2) 10
i. The 1
(1) 10 -10s (4) 10-16 s
(3)10- s
the
arge le . Then
2 a he av y nu clear target of ch
s
of energy ~ m v bombard . (2006)
An alp ha nu cleu s 2 . ortional to
l w ill be pr op
proach for the
alpha nucleus
nc e of cl os es t ap
dista (2) v2
1
(1) Ze

(3} }_ (4) __1_

v4
m
ain -PHYSICS
ARCHIVE-JEE(M
I
J
 ~

' .

·LL
0
t. 6~

,_
(4 )
·\Li_
0
ct: -"' .,,.~ '"-:"= }.
EC! , -;, ,se<i 'D re
·L, :,: ,.1;;:: ,.'':ri°;.-~t"fi•r:i;e;:z/ ·f rt ttie mea po
surement
• : = ''(oif~
. a2£}i ve
. sourc of
ga,-r.-no ray e
, ·~ : - ~
o /"fiJ'"JJ 1 pi,otons to
1 q:';r :o/~C
'?J ra'f:at!O produce io
·t. :--.:; f J O fl ns in a
'l J ': Z # .~ '"J fa tD 2 targe
t. t arget
c a il ~

'~ !/ '~.:: ·t i nuc\ e1 are

! :"Yef.• !r · ~ 5 .6 0 Me
.r ..., hB -e act1on V and 1.0o
W£'-
•
"
,. J,. .. ~
-· ; -
- j L ;/ 1~
~"( •o/, 'J:f
.,, ,. ; ,· tr/. ,y·r;I"~-, ,,, .
_., 1.'
' .,:-,.~_ ..;..,-.,.
, ~ 1 L ~ /,~ :
/
': ; ' 7 2~1
/-:; / (2 ) 2 8 .24
M eV
t4) '\. 46 M
eV
 ~-
-: .. -- :: .: :- ~ -: :-
·.-:-·.::.:-::..- :. -~
__ , ·---·"'.-
~ ~ ~ ~
· . ,,I .~
.. ., i ·,, 'J ,
µ v
:., m n a rtcid/ation fron 1 c g1v ensou,rc..~ee· ;IS 0 th
, · 1\ . ,1f · n Passing
C
of lead , it Is
rough 36 mm
.
~ .
•'1
H, I ; · . ·
ad W hi ch . .
·.• -~ ·'-.~1·'·,> ss o t le th . .
· n ie tl11ckr1e WI// reduce e intensity t I
'
(2005)
· ; -~ ;;i' w,11 be
· -1., ., 'f',f f, .
\t (2)) 9
(4 12 m
m m 0
1~ -
ll· 1
m
~ i ''• ttV
,·{1. . ,,,,; 11 l ! l
.
all bright 1
a sm laced urce of
,r>J/ r:; ,11un11nated b.y source P
aw ay. W he n the same so
1• ·
1 . mh
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e would (2005)
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be 3 F us 12s y
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itted by
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nuclei tive su
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inos their de
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th+e nucle cay?
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refusion re
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· " J th e tempe the rep
rature at u lsive p
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energy
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the reac
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