Physics MCQs Quiz Test

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Physics Solved MCQs Online Quiz Test

Q.1: Michelson calculated the speed of light using the instruments——-?

  1. spectrometer
  2. galvanometer
  3. interferometer
  4. none of these

A

Q.2: Ratio of the weight of H-atom to that of an electron is approximately——-?

  1. 18.336
  2. 1836
  3. 18360
  4. 183.6

B

Q.3: In hydrogen spectrum which one of the following series lies in the ultraviolet region ?

  1. Balmer series
  2. Pfund series
  3. Bracket series
  4. Lymann series

D

Q.4: Excited atoms return to their ground state in——–?

  1. 10-10s
  2. 10-8s
  3. 10-6s
  4. 10-9s

B

Q.5: Hydrogen atom does not emit X-rays because ———?

  1. its energy levels are too close to each other
  2. its energy levels are too far apart
  3. it is too small in size
  4. it has a single electron

D

Q.6: X-ray are——–?

  1. of unknown nature
  2. high energy electrons
  3. high energy photons
  4. radio isotopes

C

Q.7: Total number of series in hydrogen spectrum is——-?

  1. three
  2. four
  3. five
  4. six

C

Q.8: The radiations emitted form hydrogen filled discharge tube show——?

  1. band spectrum
  2. line spectrum
  3. continuous spectrum
  4. absorption spectrum

B

Q.9: Photon of highest frequency will be absorbed when transition takes place from——-?

  1. 1st to 5th orbit
  2. 2nd to 5th orbit
  3. 3rd to 5th orbit
  4. 4th to 5th orbit

A

Q.10: In obtaining an X-ray photograph of our hand we use the principle of——-?

  1. photo electric effect
  2. ionization
  3. shadow photograph
  4. any of above

C