Best strategies that boost your confidence &
pave the way for your success in the upcoming
CBSE Class 12th Physics exam.
CHAPTERS PRIORITISATION
CONCEPTUAL CLARITY
NUMERICAL PRACTICE
DERIVATIONS AND DIAGRAMS
MASTERING NCERT BOOKS
SOLVING SAMPLE PAPERS
CONCEPT MAPPING
PHYSICS STUDY REGULAR REVISION.
MATERIAL
CHAPTER WISE IMPORTANT QUESTIONS (2023-24)
BY
MUHAMMADH NOORUL HUDHA M K
PGT PHYSICS
1
ELECTROSTATICS 5.
1.
2.
6.
3.
7.
4.
8.
9.
10.
2
SEMI CONDUCTORS 8.
1.
9.
2.
3.
10.
4.
5. 11.
6.
7.
12.
3
NUCLEI 8.
1.
2. ATOMS
1.
3.
2.
4.
5.
3.
6.
4.
7.
4
5. 12.
6.
13.
7.
14.
8.
9. 15.
10.
ELECTRO MAGNETIC WAVES
11. 1.
2.
5
3. 9.
4.
10.
5.
11.
6.
7.
12.
8.
13.
6
14. 23.
15.
24.
16.
25.
17.
18.
26.
19.
27.
20.
28.
21.
29.
22.
7
30. MAGNETISM & MATTER
DEFINITIONS
31.
32.
C) RELATIVE PERMEABILITY
33.
34.
D) MAGNETIC SUSCEPTIBILITY
8
E) 2.
3.
F) 4.
5.
6.
G)
7.
8.
9.
9
10. 5.
11.
ELECTRO MAGNETIC INDUCTION
1.
6.
2.
3.
4.
7.
10
8. 14.
9. WAVE OPTICS
1.
10.
2.
3.
11.
12.
4.
13.
11
5. 10.
11.
6.
7.
RAY OPTICS
LENS MAKER’S FORMULA
8.
9.
12
13
Snell’s law
a) The incident ray, refracted ray and normal to the refracting surface are all coplanar (ie. lie in the
same plane).
b) The ratio of angle of incident i in the first medium to the angle of reflection r in the second medium
is equal to the ratio of refractive index of the second medium n2 to that of the refractive index of the
first medium n1.
The two conditions for total internal reflection are
(a) light must travel from denser to rarer medium,
(b) angle of incidence in the denser medium must be greater than critical angle (i>ic ).
ANGLE OF MINIMUM DEVIATION OPTICAL INSTRUMENT
Compound Microscope
OPTICAL INSTRUMENTS
14
ASTROMICAL TELESCOPE
REFRACTING TELESCOPE
REFLECTING TELESCOPE
15
1. 2.
3. 4.
5.
6. 7.
8. 9.
10. 11.
12.
16
ALTERNATING CURRENT
KEY WORDS
INDUCTOR : CAPACITOR :
i) Voltage leads or ahead the current by i) Current leads or ahead the voltage by
ii) Current lags the voltage by ii) Voltage lags the current by
RESISTOR :
i) Current & Voltage are in phase with each other
RMS VALUE OF CURRENT
RMS value is also defined as that value of the steady current which when flowing through a given
circuit for a given time produces the same amount of heat as produced by the alternating current when
flowing through the same circuit for the same time.
AC circuit containing pure resistor
17
AC Circuit containing only a capacitor
AC circuit containing only a capacitor
18
AC circuit containing a resistor, inductor and a capacitor in series – Series RLC circuit
RESONANCE CONDITION:
XL=XC
RESONANCE FREQUENCY GRAPH
INDUCTIVE REACTANCE (XL)
The resistance offered by the inductor, called inductive reactance (XL ). It is measured in ohm.
19
CAPACITIVE REACTANCE (Xc)
The resistance offered by the capacitor, called capacitive reactance (XC). It measured in ohm.
IMPEDANCE(Z)
Z is called impedance of the circuit which refers to the effective opposition to the circuit current by
the series RLC circuit.
Power factor
Power factor = cos ϕ = cosine of the angle of lead or lag
AC OVER DC
Advantages:
(i) The generation of AC is cheaper than that of DC.
(ii) When AC is supplied at higher voltages, the transmission losses are small compared to DC
transmission.
(iii) AC can easily be converted into DC with the help of rectifiers.
20
Disadvantages:
(i) Alternating voltages cannot be used for certain applications e.g. charging of batteries,
electroplating, electric traction etc.
(ii) At high voltages, it is more dangerous to work with AC than DC.
1. 2.
3.
4. 6.
5.
7. 8.
DUAL NATURE OF MATTER
STOPPING POTENTIAL:
The minimum energy needed for an electron to escape from the metal surface is called work function
of that metal.
POTENTIAL BARRIER
The potential barrier which prevents free electrons from leaving the metallic surface is called surface
barrier.
Effect of intensity of incident light on photoelectric current
21
Photocurrent – the number of electrons emitted per second – is directly proportional to the intensity of
the incident light.
Effect of potential difference on photoelectric current
The maximum kinetic energy of the photoelectrons is independent of intensity of the incident light
Effect of frequency of incident light on stopping potential
As the frequency is increased, the photoelectrons are emitted with greater kinetic energies so that the
retarding potential needed to stop the photoelectrons is also greater
22
Laws of photoelectric effect
i) For a given frequency of incident light, the number of photoelectrons emitted is directly
proportional to the intensityof the incident light. The saturation current is also directly proportional to
the intensity of incident light.
ii) Maximum kinetic energy of the photo electrons is independent of intensity of the incident light.
iii) Maximum kinetic energy of the photo electrons from a given metal is directly proportional to the
frequency of incident light.
iv) For a given surface, the emission of photoelectrons takes place only if the frequency of incident
light is greater than a certain minimum frequency called the threshold frequency.
v) There is no time lag between incidence of light and ejection of photoelectrons.
CHARACTERISTICS OF PHOTONS
23
2.
3.
1.
4. 5.
6. 7.
8. 9.
10.
24
ELECTROSTATIC POTENTIAL & CAPACITANCE
1. 2.
3. 4.
5. 6.
7. 8.
9. 10.
25
CURRENT ELECTRICITY
The average velocity attained by charged particles, (eg. electrons) in a material due to an electric field.
MOBILITY
MOBILITY can be defined as the magnitude of the drift velocity per unit electric field
CURRENT DENSITY (J)
DERIVATION FOR DRIFT VELOCITY, OHM’S LAW , RESISTIVITY
26
1. 2.
3. 8.
5.
6.
7.
27
MOVING CHARGES & MAGNETISM
1. 2.
3. 4.
5. 6.
7. 8.
9.
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