University of Nigeria Physics Post Utme Past Questions and Answers

Question 11 :

In the Hare's apparatus, water rises to a height of \(26.5 \mathrm{~cm}\) in one limb. If a liquid rises to a height of \(20.4 \mathrm{~cm}\) in the other limb, what is relative density of the liquid?

A. 0.8
B. 1.1
C. 1.2
D. 1.3

Question 12 :

A p-m junction diode is used as ____________

A. A rectifier in a d.c circuit
B. An amplifier in an a.c circuit
C. A rectifier in an a.c circuit
D. An amplifier in a d.c circuit

Question 13 :

The sharpness of the boundaries of the shadow of an object is determined by the ____________

A. Rays of light passing through the object
B. Intensity of light striking the object
C. Opacity of the object
D. Nature of the object

Question 14 :

A body of mass \(4 \mathrm{~kg}\) is acted on by a constant force of \(12 \mathrm{~N}\) for 3 seconds.
The kinetic energy gained by the body at the end of the time is ____________

A. 162J
B. 144J
C. 72J
D. 81J

Question 15 :

Two inductors of inductances \(4 \mathrm{H}\) and \(8 \mathrm{H}\) are arranged in series and a current of \(10 \mathrm{~A}\) is passed through them.
What is the energy stored in them?

A. 500J
B. 50J
C. 133J
D. 250J