Post Utme Physics Past Questions and Answers

Question 1191:

If ' \(a\) ' represents the velocity ratio of an inclined plane of length \(10 m\) and height \(5 m\) and ' \(b\) ' represents the velocity ratio of a block - and - tackle system consisting of 6 pulleys, \(\frac{(b-a)}{b}\) equals

A. \(1 / 6\)
B. \(2 / 3\)
C. 2
D. \(1 / 2\)

Question 1192:

What is the peak voltage across a \(10 H\) inductor in series with a \(500 \Omega\) resistance assuming that a voltage of 20 volts (r.m.s) and frequency of \(50 Hz\) is applied across the circuit?

A. \(28.28 V\)
B. \(27.94 V \)
C. \(22.33 V\)
D. None of the above

Question 1193:

What is the velocity ratio of an inclined plane inclined at an angle of \(30^{\circ}\) to the vertical?

A. 2
B. \(\frac{\sqrt{3}}{2}\)
C. \(\frac{2 \sqrt{3}}{2}\)
D. \(\frac{2 \sqrt{3}}{3}\)

Question 1194:

What is responsible for the conduction of electricity in semi-conductors?

A. Free mobile electrons only
B. Free mobile electrons and holes only
C. Free holes only
D. Free mobile electrons and ions

Question 1195:

A car moving with a velocity of \(72 km / hr\) was brought to rest in \(10 s\) by a constant retarding force, what was the total distance covered during this time?

A. \(200 m\)
B. \(50 m\)
C. \(100 m\)
D. \(125 m\)