Post Utme Physics Past Questions and Answers

Question 66:

A uniform wave has a speed of \(10 \mathrm{~m} / \mathrm{s}\) and a period of \(0.5 \mathrm{~s}\). The distance between two nearest crests is ____________

A. \(0.2 \mathrm{~m}\)
B. \(20 \mathrm{~m}\)
C. \(2 \mathrm{~m}\)
D. \(5 \mathrm{~m}\)

Question 67:

An organ pipe closed at one end is \(80 \mathrm{~cm}\) long. Determine the frequency of the fundamental note assuming that the speed of sound in air is \(340 \mathrm{~m} / \mathrm{s}\) ?

A. \(213 \mathrm{~Hz}\)
B. \(318 \mathrm{~Hz}\)
C. \(425 \mathrm{~Hz}\)
D. \(106 \mathrm{~Hz}\)

Question 68:

As transverse wave moves through a medium, the particles of the medium ____________

A. Vibrate in a path parallel to the path of the wave
B. Do not move
C. Vibrate in a path perpendicular to the path of the wave
D. Vibrate at an angle of 600 to the path of the wave

Question 69:

The sound heard after the reflection of sound wave from a plane surface is known as ____________

A. Echo
B. Refraction
C. Vibration
D. Revibration

Question 70:

Which of the following properties is not common to all waves?

A. Reflection
B. Interference
C. Diffraction
D. Polarization