Dual Nature Of Radiation & Matter

15 Questions | By Jagranjosh | Updated: Mar 21, 2022 | Attempts: 661

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Dual Nature Of Radiation & Matter - Quiz

Time: 30 Minute

Questions and Answers

1.

The de-Broglie wavelength of particle of mass 1 mg moving with a velocity of 1 ms^-1, in terms of Planck’s constant h, is given by (in metre):
- A.
  
  10⁵ h
- B.
  
  10⁶ h
- C.
  
  10^-3 h
- D.
  
  10³ h
2.

Photoelectric effect can be caused by:
- A.
  
  X-rays
- B.
  
  Visible light
- C.
  
  γ-rays
- D.
  
  All of these
3.

A graph plotted taking stopping potential along the y-axis and frequency of incident light (v) along the x-axis. The slope of this graph is given by:
- A.
  
  H
- B.
  
  E
- C.
  
  Eh
- D.
  
  H/e
4.

Protons and alpha particles have the same de-Broglie wavelength. What is same for both of them?
- A.
  
  Energy
- B.
  
  Time Period
- C.
  
  Frequency
- D.
  
  Momentum
5.

Maximum kinetic energy (E_o) of a photoelectron varies with frequency (f) of the incident radiation. Which of the following correctly represents this variation?
- A.
- B.
- C.
- D.
6.

What is the de-Broglie wavelength of a proton accelerated from rest through a potential difference of V volts?
- A.
  
  12.3 Ǻ
- B.
  
  1.23 Ǻ
- C.
  
  0.123 Ǻ
- D.
  
  None of these
7.

A proton, a neutron, an electron and an α-particle have same energy. Then their de-Broglie wavelengths compare as:
- A.
- B.
- C.
- D.
8.

An X-ray tube produces a continuous spectrum of radiation with its short wavelength end at 0.45 Ǻ. What is the maximum energy of a photon in the radiation?
- A.
- B.
- C.
- D.
  
  None of these
9.

Which of the following represents the variation of de-Broglie wavelength (λ) with momentum (p) of a body?
- A.
- B.
- C.
- D.
10.

When an electron jumps across a potential difference of 1 V, it gains energy equal to:
- A.
- B.
- C.
- D.
11.

Which of the following has minimum stopping potential?
- A.
  
  Blue
- B.
  
  Yellow
- C.
  
  Violet
- D.
  
  Red
12.

If the momentum of electron is changed by P, then the de Broglie wavelength associated with it changes by 0.5%. The initial momentum of electron will be:
- A.
  
  100 P
- B.
  
  200 P
- C.
  
  400 P
- D.
  
  P/200
13.

The kinetic energy of an electron gets tripled, then the de-Broglie wavelength associated with it changes by a factor:
- A.
- B.
- C.
- D.
  
  3
14.

When the radiation of a photoelectron emitter, the stopping potential is found to be 9V. If e/m for the electron is the maximum velocity of the ejected electron is:
- A.
- B.
- C.
- D.
15.

Two radiations of photons energies 1 eV and 2.5 eV, successively illuminate a photosensitive metallic surface of work function 0.5 eV. The ratio of the maximum speeds of the emitted electrons is:
- A.
  
  1 : 4
- B.
  
  1 : 2
- C.
  
  1 : 1
- D.
  
  1 : 5