Post Utme Physics Past Questions and Answers

Question 86:

What is the Celsius equivalent of \(50.0^{\circ} \mathrm{F}\) ?

A. \(10^{\circ} \mathrm{C}\)
B. \(20^{\circ} \mathrm{C}\)
C. \(30^{\circ} \mathrm{C}\)
D. \(40^{\circ} \mathrm{C}\)

Question 87:

How far from a concave mirror of radius \(120 \mathrm{~cm}\) must an object be placed such that its erect image is four times its natural size?

A. \(72 \mathrm{~cm}\)
B. \(64 \mathrm{~cm}\)
C. \(45 \mathrm{~cm}\)
D. \(50 \mathrm{~cm}\)

Question 88:

How many images are formed when an object is placed in front of two plane mirrors that are inclined at angle 30 o to each other?

A. O
B. 6
C. 11
D. 12

Question 89:

A body falls freely under gravity \(\left(\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^{2}\right)\) from a height of \(10 \mathrm{~m}\) on top of \(\mathrm{a}\) platform \(0.8 \mathrm{~m}\) above the ground. Its velocity on reaching the platform is ____________

A. \(7848 \mathrm{~m} / \mathrm{s}\)
B. \(80 \mathrm{~m} / \mathrm{s}\)
C. \(78 \mathrm{~m} / \mathrm{s}\)
D. \(27.78 \mathrm{~m} / \mathrm{s}\)

Question 90:

A hydrometer is an instrument used for measuring the ____________

A. Depth of water in a vessel
B. Relative density of a liquid by method of flotation
C. Relative density of a liquid by finding the apparent loss in weight
D. Relative humidity of the atmosphere