CBSE Class 12 Dual Nature of Radiation and Matter Multiple Choice Questions with Answers. MCQ Questions Class 12 Dual Nature of Radiation and Matter with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Dual Nature of Radiation and Matter MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Dual Nature of Radiation and Matter with Answers - Set - 5
Question 1:
A photon of energy 4 eV is incident on a metal surface whose work function is 2eV. The minimum reverse potential to be applied for stopping the emission of electrons is
(a) 2V
(b) 4V
(c) 6V
(d) 8V
Correct Answer – (A)
Question 2 :
If an electron and a photon propagate in the form of waves having the same wavelength, it implies that they have the same
(a) energy
(b) momentum
(c) velocity
(d) angular momentum
Correct Answer – (B)
Question 3 :
A laser beam is used for carrying out surgery because it
(a) is highly monochromatic
(b) is highly coherent
(c) is highly directional
(d) can be sharply focussed
Correct Answer – (D)
Question 4 :
The surface of zone material is radiated in turn by waves of l = 350 nm and 540 nm respectively.
The ratio of the stopping potential in the two cases is 2 : 1. The work function of the material is
(a) 4.20 eV
(b) 0.15 eV
(c) 2.10 eV
(d) 1.05 eV
Correct Answer – (D)
Question 5 :
When cathode rays strike a metal target of high melting point with a very high velocity then which of the following are produced ?
(a) g-waves
(b) Ultrasonic
(c) X-rays
(d) a-rays
Correct Answer – (C)
MCQ Questions Class 12 Dual Nature of Radiation and Matter with Answers
Question 6 :
Characteristic X-rays are produced due to
(a) transfer of momentum in collision of electrons with target atoms
(b) transition of electrons from higher to lower electronic orbits of an atom
(c) heating of the target
(d) transfer of energy in collision of electrons with atoms in the target.
Correct Answer – (B)
Question 7 :
A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be
(a) 1840 keV
(b) 1/1840 keV
(c) 1keV
(d) 920 V
Correct Answer – (C)
Question 8 :
Light of wavelength 4000 Åis incident on a metal plate whose work function is 2eV. What is maximum kinetic energy of emitted photoelectron?
(a) 0.5 eV
(b) 1.1 eV
(c) 2.0 eV
(d) 1.5 eV
Correct Answer – (B)
Question 9 :
Particle nature and wave nature of electromagnetic waves and electrons can be represented by :
(a) photoelectricity and electron microscopy
(b) light is refracted and diffracted
(c) X-rays is diffracted, reflected by thick metal sheet
(d) electrons have small mass, deflected by the metal sheet.
Correct Answer – (A)
Question 10 :
The kinetic energy of an electron, which is accelerated in the potential difference of 100 V, is :
(a) 1.6 × 10–10 J
(b) 1.6 × 108 J
(c) 1.6 × 10–17 J
(d) 1.6 × 10–18 J
Correct Answer – (C)
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