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Physics Mcqs

Submitted By :Ali Uppal


If stretching force T of wire increases, then its frequency __________________?

  • (A)  decreases
  • (B)  increases
  • (C)  remains the same
  • (D)  any of above
Submitted By :Ali Uppal


When two identical traveling waves are superimposed, the velocity of the resultant wave__________________?

  • (A)  decreases
  • (B)  increases
  • (C)  remains unchanged
  • (D)  becomes zero
Submitted By :Ali Uppal


The waves that require a material medium for their propagation are called__________________?

  • (A)  matter waves
  • (B)  electromagnetic waves
  • (C)  carrier waves
  • (D)  mechanical waves
Submitted By :Ali Uppal


Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?

  • (A)  Dopplers effect
  • (B)  Interference of waves
  • (C)  Beats phenomena
  • (D)  All of these
Submitted By :Ali Uppal


The speed of stationary waves in a stretched string are independent of___________________?

  • (A)  Number of loops
  • (B)  Tension in the string
  • (C)  Point where string is plucked
  • (D)  both A and C
Submitted By :Ali Uppal


The speed of sound in hydrogen is _____________ time than that in oxygen?

  • (A)  Two times
  • (B)  Three times
  • (C)  Four time
  • (D)  Six time
Submitted By :Ali Uppal


Newton estimated the speed of sound _____________________?

  • (A)  281m/sec
  • (B)  333m/sec
  • (C)  340m/sec
  • (D)  all of the above
Submitted By :Ali Uppal


Which one is the correct relation for fundamental frequency of open and closed pipe ?

  • (A)  fopen = 2 fclosed
  • (B)  fclosed = 2fopen
  • (C)  fopen = fclosed
  • (D)  fopen = 1 / f closed
Submitted By :Ali Uppal


When the source of sound moves away form a stationary listener then ______________ occurs?

  • (A)  an apparent increase in frequency
  • (B)  an apparent decrease in frequency
  • (C)  an apparent decrease in wavelength
  • (D)  no apparent change in frequency
Submitted By :Ali Uppal