Post Utme University of Calabar Physics Past Questions and Answers

Question 21:

The expansion of solids can be considered a disadvantage in ____________

A. Fire-alarm system
B. Themmostat
C. Riverting of steel plates
D. Balance wheel of a watch

Question 22:

An object is placed between 2 mirrors inclined at an angle of \(120^{\circ}\) and facing each other. Determine the number of images observed in the 2 mirrors

A. 2
B. 3
C. 4
D. 1