11

Class 12 Physics - Chapter 11: Dual Nature Of Radiation And Matter MCQ Questions

8 Questions 16 Minutes
Answered: 0 / 8Unanswered: 8

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  1. 1LearnNCERT Solutions
  2. 2PracticeChapter MCQs
  3. 3TestChapter Test
  4. 4PrepareSample Papers
  5. 5Exam PracticePrevious-Year Papers
  6. 6Final CheckMock Test
Question 1

(vec {B}) = B0(hat {j}). Then its de-Broglie wavelength

Question 2

When the light of frequency 2v0 (where v0 is threshold frequency) is incident on a metal plate, the maximum velocity of electrons emitted is v1. When the frequency of the incident radiation is increased to 5v0, the maximum velocity of electrons emitted from the same plate is v2. The ratio of v1 to v2 is:

Question 3

(Given h = 4.14 × 10-15 eVs and c = 3 × 108 m s-1)

Question 4

The wavelength of a photon needed to remove a proton from a nucleus which is bound to the nucleus with 1 MeV energy is nearly

Question 5

A particle is dropped from a height H. The de-Broglie wavelength of the particle as a function of height is proportional to

Question 6

Photons with energy 5 eV are incident on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2 eV. When photons of energy 6 eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is

Question 7

(vec {E}) = E0(hat {j}). If λ0 = (frac { h }{mv_0}), its de-Broglie wavelength at time t is given by

Question 8

A proton, a neutron, an electron and an a-particle have same energy. Then their de-Broglie wavelengths compare as

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