Post Utme Physics Past Questions and Answers

Question 846:

The amount of heat needed to raise the temperature of \(10 \mathrm{~kg}\) of copper by \(1 \mathrm{~K}\) is its ____________

A. Specific heat capacity
B. Heat capacity
C. Latent heat
D. Internal heat

Question 847:

A note is called an octave of another note when ____________

A. Its frequency is wide than that of the first note
B. Its frequency is half that of the first note
C. The notes have the same fundamental frequency
D. Its periodic time is twice than that of the first note

Question 848:

To obtain a magnification of \(2.5\), how far should an object be placed from the pole of a thin converging lens of focal length \(10.2 \mathrm{~m}\)?

A. \(0.13 \mathrm{~m}\)
B. \(0.25 \mathrm{~m}\)
C. \(0.28\)
D. \(0.50 \mathrm{~m}\)

Question 849:

When white light is dispersed by a spectrometer, the component having the shortest wavelength is ____________

A. Orange
B. Green
C. Violet
D. Red

Question 850:

A household refrigerator is rated 200 watts. If electricity costs \(5 \mathrm{k}\) per \(\mathrm{kWh}\), what is the cost of operating it for 20 days?

A. #4480
B. \(#448.00\)
C. \(\#480.00\)
D. \(\#4,800.00\)