Waves MCQs for MDCAT Practice

Physics section, Waves chapter. Sample questions from past PMC papers.

1. Question 1
   In Young’s Double Slit Experiment, if the distance between slits and screen is doubled, then fringe spacing becomes:
   • A.Zero
   • B.Double the original value
   • C.One
   • D.Half of the original value
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2. Question 2
   When a wave goes from one medium to another medium, which one one of the following characteristics of the wave remains constant?
   • A.Velocity
   • B.Wavelength
   • C.Frequency
   • D.Phase
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3. Question 3
   Newton’s rings may be observed if you place a curved glass surface on a flat grass surface. A thin film of air is wedged between the glass surface. Looking down, one can see several rings around the point where the two glass surfaces touch. Newton’s rings are produced by:
   • A.Interference
   • B.Diffraction
   • C.Polarization
   • D.Absorption
   • E.Shadows
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4. Question 4
   In a stationary wave, all particles are:
   • A.at rest at the same time twice in every period of oscillation
   • B.at rest at the same time only once in every period of oscillation
   • C.never at rest at the same time
   • D.never at rest at all
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5. Question 5
   The new position of a wave front time t is determined by using:
   • A.Huygen’s principle
   • B.Michelson interferometer
   • C.Young’s double slit experiment
   • D.Bragg’s formula
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6. Question 6
   Which of the following statements about speed of sound v, and temperature is correct?
   • A.V is directly related to temperature
   • B.V is directly related to square root of temperature
   • C.V is directly related to absolute temperature
   • D.V is directly related to square root of absolute temperature
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7. Question 7
   Two travelling waves of the "same frequency", "same amplitude", and travelling in "opposite direction" result in?
   • A.Beats
   • B.Standing waves
   • C.Diffraction
   • D.None of these options are correct
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8. Question 8
   In a vibrating cord the point where the particles are stationary is called:
   • A.Crest
   • B.Anti-node
   • C.Node
   • D.Trough
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