Modern Physics MCQ question and answer with solution | Physics Gk MCQs

A. a-1, b-2, c-3, d-4

B. a-3, b-1, c-2, d-4

C. a-2, b-1, c-4, d-2

D. a-2, b-3, c-4, d-1

A. The wavelength of infrared is more than that of ultraviolet radiation

B. The wavelength of ultraviolet is smaller than that of visible light

C. The photon energy of visible light is more than that of infrared light

D. The photon energy of ultraviolet is less than that of visible light

A. Zirconium

B. Uranium

C. Molybedenum

D. Vanadium

A. nuclear fusion

B. controlled nuclear fusion

C. uncontrolled nuclear fission

D. controlled nuclear fission

A. Will remain same

B. Will be doubled

C. Will be halved

D. Will be four times of the original wavelength

A. Uranium

B. Iron

C. Copper

D. Aluminium

A. the nucleus is of infinite mass and is at rest

B. electrons in a quantized orbit with hot radiate energy

C. mass of electron remains constant

D. All of the above

A. Place where atomic bomb is built

B. Heavy water pond

C. The emitter of U₂₃₈

D. Molecular furnace

A. 1.6 × 10^-19 J

B. 1.6 × 10^-16 J

C. 1 × 10^-19 J

D. 1 × 10^-16 J

A. Both (A) and (R) are true and (R) is the correct explanation of (A)

B. Both (A) and (R) are true, but (R) is not the correct explanation of (A)

C. (A) is true, but (R) is false

D. (A) is false, but (R) is true