GUIDED REVISION JEE (Advanced) 2023
JEE (Advanced)
ENTHUSIAST 2023
& LEADER COURSE
ENTHUSIAST & LEADER COURSE
PHYSICS GR # DAMPED & FORCED OSCILLATION
SOLUTION
SECTION-I
Single Correct Answer Type 15 Q. [3 M (–1)]
1. Ans. (C)
2. Ans. (B)
3. Ans. (D)
4. Ans. (B)
5. Ans. (A)
6. Ans. (B)
®
7. Ans. (C)
8. Ans. (B)
9. Ans. (B)
Sol. Equation of demped oscillation
x = é Ae ù sin wt
- b mt
2
êë úû
é -Rtù
I = ê I 0 e 2 L ú sin wt
ë û
I0
I 0e - ( R / 2 L ) t = For maximum
e
R
t =1 f = wt
2L
2L 2 Lw
t= f= ( X L = wL)
R R
2 ´ 200 10
( 2p ) n = =n =
20 p
10. Ans. (D)
2
K b 2p
Sol. w' = - and w ' =
m 4m2 T
11. Ans. (D)
Sol. This is the case of Damped oscillation.
12. Ans. (C)
Sol. Considering gravity, buoyant force and viscouse force oscillation will be damped.
W12 = w22 - C , w2 is natural frequency..
Þ T1 > T2 C is a constant.
Physics / GR # Damped & Force oscillation E-1/2
GUIDED REVISION JEE (Advanced) 2023
ENTHUSIAST & LEADER COURSE
13. Ans. (B)
14. Ans. (C)
15. Ans. (B)
m
Sol. T0 = 2p
k
2p
=
10
A = A0e- t / g
A0
\ for A = ,t=g
e
®
2m 2m
t=g= = 2 2 = 104 s
b Bl
R
t 104
\ No of oscillation T = » 5000 .
0 2p / 10
Multiple Correct Answer Type 2 Q. [4 M (–1)]
16. Ans. (A,B,D)
17. Ans. (A,D)
Linked Comprehension Type (1 Para × 2Q.) [3 M (-1)]
(Single Correct Answer Type)
18. Ans. (A)
19. Ans. (D)
SECTION-II
Linked Comprehension Type (1 Para × 2Q.) [3 M (-1)]
(upto second decimal place)
20. Ans. 50.00
21. Ans. 30.00
Numerical Answer Type Question 1Q.[3(0)]
(upto second decimal place)
22. Ans. 0.4
E-2/2 Physics / GR # Damped & Force oscillation