Post Utme Physics Past Questions and Answers

Question 136:

Which of the following statements give the TRUE difference between evaporation and boiling?

I. Evaporation occurs at all temperatures while boiling occurs at a fixed temperature for a given pressure
II. Evaporation is a surface phenomenon while boiling is an interior phenomenon
III. Evaporation is affected by surface area while boiling is not

A. I and II only
B. I and III only
C. II and III only
D. I, II and III only

Question 137:

Equal masses of copper and rubber are raised to the same temperature. After sometime, the copper was observed to be at a lower temperature because ____________

A. The specific heat capacity of copper is lower than that of rubber.
B. Copper expands more than rubber.
C. The specific heat capacity of rubber is lower than that of copper.
D. Rubber expands more than copper.

Question 138:

Which of the following statements is correct about a long-sighted boy who does not put on glasses?

A. He cannot see distant objects clearly
B. Rays of light from a close object are focused in front of the retina
C. His eyeball is too long
D. None

Question 139:

A \(12 \mathrm{~V}\) battery has an internal resistance of \(0.5 \Omega\). If a cable of \(1.0 \Omega\) resistance is connected across the terminals of the battery, the current drawn from die battery is ____________

A. \(16.0 \mathrm{~A}\)
B. \(8.0 \mathrm{~A}\)
C. \(0.4 \mathrm{~A}\)
D. \(0.4 \mathrm{~A}\)

Question 140:

If two parallel wires carry currents flawing in the same direction, the conductors will ____________

A. Attract each other
B. Repel each other
C. Both move in the same direction
D. Have no effect on each-other