12th class (Fsc) Physics unit 8 MCQs

a. mo/hc(1 – cos θ)
b. h/moc(1 – cos θ)
c. h/moc2 (1 – cos θ)
d. h/moc2 (1 – cos θ)

b. h/moc(1 – cos θ)

a. 9×1016 J
b. 9×108 J
c. 9×1019 J
d. 9×1012 J

b. 9×108 J

a. Nicked
b. Sodium
c. Cobalt
d. Copper

b. Sodium

a. Pair production
b. Annihilation of matter
c. Photo electron effect
d. Compton effect

a. Pair production

a. Three postulates
b. One postulate
c. Four postulates
d. Two postulates

d. Two postulates

a. 1600o C
b. 900o C
c. 500o C
d. 1300o C

d. 1300o C

a. HU pair production
b. Photoelectric effect
c. Annihilation of matter
d. Compton effect

a. HU pair production

a. 931 MeV
b. 0.51 MeV
c. 2.10 MeV
d. 1.02 MeV

d. 1.02 MeV

a. 1100o C
b. 500o C
c. 1300o C
d. 900o C

a. 1100o C

a. 45o
b. 0o
c. 180o
d. 90o

d. 90o

a. Wave
b. Particle
c. Nucleon
d. Both A & B

b. Particle

a. Momentum
b. Acceleration
c. Entropy
d. Angular

c. Entropy

a. 1100o C
b. 1600o C
c. 900o C
d. 1300o C

b. 1600o C

a. X-rays
b. Gamma rays
c. Positive rays
d. Beta rays

a. X-rays

a. Pair production
b. Photo electric effect
c. Nuclear fission
d. Compton effect

a. Pair production

a. E= σT4
b. E= hf
c. λ x T =constant
d. E= mc2

a. E= σT4

a. hf
b. h/λ
c. hλ/c
d. hc/λ

b. h/λ

a. 0.51 MeV
b. 2 MeV
c. 5 MeV
d. 1.02 MeV

a. 0.51 MeV

a. 0.611 MeV
b. 0.411 MeV
c. 0.711 MeV
d. 0.511 MeV

d. 0.511 MeV

a. Shape and size of body
b. Nature of surface of body
c. Temperature of the body
d. Nature of material of body

c. Temperature of the body

a. 1.2 MeV
b. 0.51 MeV
c. 1.00 MeV
d. 1.02 MeV

d. 1.02 MeV

a. 1.02 MeV
b. 0.52 MeV
c. 0.051 MeV
d. 1.51 MeV

a. 1.02 MeV

a. 1100o C
b. 500o C
c. 1300o C
d. 900o C

d. 900o C

a. Acceleration
b. Energy
c. Angular momentum
d. Power

c. Angular momentum

a. 9.1×10-3 kg
b. Zero
c. 1.67×10-31 kg
d. 1.67×10-27 kg

b. Zero

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