Post Utme Physics Past Questions and Answers

Question 541:

In which of the following material media would wound travel fastest

A. Water
B. Oil
C. Metal
D. Gas

Question 542:

An electric kettle with negligible heat capacity is rated at \(2000 \mathrm{~W}\). if \(2.0 \mathrm{~kg}\) of water is put in it, how long will it take the temperature of water to rise from \(20^{\circ} \mathrm{C}\) to \(100^{\circ} \mathrm{C}\) ? [specific heat capacity of water \(4200 \mathrm{JkhK}^{-1}\) ]

A. \(420 \mathrm{~s}\)
B. \(336 \mathrm{~s}\)
C. 168s
D. 84s

Question 543:

Which of the following is the exclusive property of a transverse wave?

A. Diffraction
B. Refraction
C. Compression
D. Polarization

Question 544:

The pitch of an acoustic device can be increased by ____________

A. Increasing the frequency
B. Increasing the amplitude
C. Decreasing the loudness
D. Decreasing the intensity

Question 545:

Which of the following pairs of colours gives the widest separation in the spectrum of white light?

A. Red and violet
B. Green and yellow
C. Red and indigo
D. Yellow and violet