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 - 3
Question 1:
What is the de-Broglie wavelength of an electron accelerated from rest through a potential difference of 100 volts?
(a) 12.3 Å
(b) 1.23 Å
(c) 0.123 Å
(d) None of these
Correct Answer – (B)
Question 2 :
In photo electric emission, for alkali metals the threshold frequency lies in the:
(a) visible region
(b) ultraviolet region
(c) infrared region
(d) far end of the infrared region
Correct Answer – (A)
Question 3 :
Millikan’s oil drop experiment makes use of:
(a) Stokes’ law
(b) Boyle’s law
(c) Gas equation
(d) Bernoulli’s theorem
Correct Answer – (A)
Question 4 :
The momentum of an electron that emits a wavelength of 2 Å. will be:
(a) 6.4 × 10-36 kgms-1
(b) 3.3 × 10-24 kgms-1
(c) 3.3 × 10-34 kgms-1
(d) none of these
Correct Answer – (B)
Question 5 :
The work function of photoelectric material is 3.3 eV. The threshold frequency will be equal to:
(a) 8 × 1014 Hz
(b) 8 × 1010 Hz
(c) 5 × 1010 Hz
(d) 4 × 1014 Hz
Correct Answer – (A)
MCQ Questions Class 12 Dual Nature of Radiation and Matter with Answers
Question 6 :
Which of the following radiations cannot eject photo electrons?
(a) ultraviolet
(b) infrared
(c) visible
(d) X-rays
Correct Answer – (B)
Question 7 :
X-rays are:
(a) deflected by an electric field
(b) deflected by a magnetic field
(c) deflected by both electric and magnetic fields
(d) not deflected by electric and magnetic fields
Correct Answer – (D)
Question 8 :
Name the scientists who first studied the passage of electricity through fluids to establish the electrical nature of matter:
(a)Millikan
(b) Planck
(c) Faraday
(d) Boyle
Correct Answer – (C)
Question 9 :
The strength of photoelectric current depends upon :
(a) angle of incident radiation
(b) frequency of incident radiation
(c) intensity of incident radiation
(d) distance between anode and cathode
Correct Answer – (B)
Question 10 :
In Thomson’s experiment number of parabola gives :
(a) the no. of electrons present in element
(b) the no. of proton present in element
(c) the no. of neutrons present in element
(d) the no. of isotopes of the element present
Correct Answer – (D)
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