CBSE Class 12 Physics Dual Nature of Radiation and Matter MCQs Set D

Question. Which of the following waves can produce photo electric effect
(a) UV radiation
(b) Infrared radiation
(c) Radio waves
(d) Microwaves

Answer: A

Question. Work function of alkali metals is
(a) less than zero
(b) just equal to other metals
(c) greater than other metals
(d) quite less than other metals

Answer: D

Question. Packet of energy are called
(a) electron
(b) quanta
(c) frequency
(d) neutron

Answer: B

Question. One quantum of radiation is called
(a) meter
(b) meson
(c) photon
(d) quark

Answer: C

Question. Energy associated with each photon
(a) hc
(b) mc
(c) hv
(d) hk

Answer: C

Question. One quantum of radiation is called
(a) meter
(b) meson
(c) photon
(d) quark

Answer: C

Question. If an electron and proton are propagating in the form of waves having the same λ , it implies that they have the same
(a) energy
(b) momentum
(c) velocity
(d) angular momentum

Answer: B

Question. Moving with the same velocity , which of the following has the longest de Broglie wavelength?
(a) ᵦ -particle
(b) α -particle
(c) proton
(d) neutron.

Answer: B

Question.The dual nature of light is exhibited by
(a) diffraction and photo electric effect
(b) photoelectric effect
(c) refraction and interference
(d) diffraction and reflection.

Answer: A

Question. If the momentum of a particle is doubled , then its de-Broglie wavelength will
(a) remain unchanged
(b) become four times
(c) become two times
(d) become half

Answer: D

Question. Velocity of a body of mass m, having de-Broglie wavelength λ , is given by relation
(a) v = λ h/m
(b) v = λm/h
(c) v = λ/hm
(d) v = h/ λm

Answer: D