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MDCAT Question Bank

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1009 available questions

Physics · Question 871

When light interference occurs:

  1. Energy is created at maxima
  2. Energy is destroyed at minima
  3. Energy is redistributed, not created or destroyed
  4. All of these
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Correct answer: C

Energy is redistributed, not created or destroyed

The printed worksheet key marks C (Energy is redistributed, not created or destroyed) as the correct answer.

Physics · Question 872

If the apparatus of Newton's Rings is moved from air to water, the rings spacing:

  1. Remains same
  2. Increases
  3. Decreases
  4. Becomes maximum
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Correct answer: C

Decreases

The printed worksheet key marks C (Decreases) as the correct answer.

Physics · Question 873

In YDSE the process under observation is:

  1. Interference
  2. Diffraction
  3. Both interference and diffraction
  4. Neither
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Correct answer: A

Interference

The printed worksheet key marks A (Interference) as the correct answer.

Physics · Question 874

Two identical lamps illuminate two narrow slits but produce no stable interference pattern because their light is:

  1. Not monochromatic
  2. Coherent
  3. Monochromatic
  4. Not coherent
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Correct answer: D

Not coherent

The printed worksheet key marks D (Not coherent) as the correct answer.

Physics · Question 875

If four fringes appear above the central fringe in a symmetric YDSE pattern, how many fringes are visible in total?

  1. 4
  2. 9
  3. 5
  4. Can't be predicted
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Correct answer: B

9

The printed worksheet key marks B (9) as the correct answer.

Physics · Question 876

Which are recognized types of optical fibre?

  1. Single-mode step-index
  2. Multimode step-index
  3. Multimode graded-index
  4. All of these
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Correct answer: D

All of these

The printed worksheet key marks D (All of these) as the correct answer.

Physics · Question 877

Approximately what is the critical angle for a glass-air boundary?

  1. 41.5°
  2. 41.0°
  3. 41.8°
  4. 41.2°
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Correct answer: C

41.8°

The printed worksheet key marks C (41.8°) as the correct answer.

Physics · Question 878

A basic fibre-optic communication system contains how many main components?

  1. Two
  2. Three
  3. Five
  4. Four
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Correct answer: B

Three

The printed worksheet key marks B (Three) as the correct answer.

Physics · Question 879

Multimode step-index fibre is mainly useful for:

  1. Long distances
  2. Short distances
  3. Neither
  4. None of these
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Correct answer: B

Short distances

The printed worksheet key marks B (Short distances) as the correct answer.

Physics · Question 880

A typical listed core diameter for multimode step-index fibre is:

  1. 10 μm
  2. 50 μm
  3. 100 μm
  4. 20 μm
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Correct answer: B

50 μm

The printed worksheet key marks B (50 μm) as the correct answer.