Post Utme Physics Past Questions and Answers

Question 881:

An object placed 10cm from a concave mirror of focal length Scm would have its image ____________

A. At infinity
B. 10cm from the focus
C. At the radius of curvature
D. At the centre of curvature

Question 882:

Which of the following radiation has the highest frequency?

A. Infra-red rays
B. Radio waves
C. Light waves
D. X-rays

Question 883:

When a ray of light is incident normally on an air-glass interface, its angle of refraction is ____________

A. 60°
B. 30°
C. 150°
D. 0°

Question 884:

Which gas is filled in refrigeration?

A. Acetylene
B. Chlorofluorocarbon
C. Methane
D. Carbon monoxide

Question 885:

The efficiency of air-conditioning machine is measured in ____________

A. Tonnes
B. Pe. cro
C. Percentage
D. Temperature