Post Utme Economics Past Questions and Answers

Question 961:

Determine the elastic constant of a spring if a force of \(1 \mathrm{~N}\) stretches it by \(2.7 \mathrm{~cm}\)

A. \(0.4 \mathrm{Nm}^{-1}\)
B. \(40,4 \mathrm{Nm}^{-1}\)
C. \(37.0 \mathrm{Nm}^{-1}\)
D. \(40.0 \mathrm{Nm}^{-1}\)

Question 962:

Which of the following objects is NOT in stable equilibrium?

A. A car with wide base and low centre of gravity
B. A ball in the middle of a bowl
C. A car with narrow base and high centre of gravity
D. A cone resting on its base

Question 963:

Which of the following is not true of boiling?

A. Temperature is constant during boiling
B. Occurs throughout the entire volume of the liquid
C. Takes place at all temperatures
D. It is change from liquid to vapour at the boiling point

Question 964:

A swimming pool viewed directly from above its surface appears to be \(12 \mathrm{~m}\) deep. Find the real depth (Refractive index of water \(=\frac{4}{3}\) ).

A. \(16 \mathrm{~m}\)
B. \(20 \mathrm{~m}\)
C. \(10 \mathrm{~m}\)
D. \(24 \mathrm{~m}\)

Question 965:

A transformer has 500 turns in the primary coil and 400 turns in the secondary coil. Find the voltage in the secondary coil when the primary coil is connected to a \(220 \mathrm{~V}\) main.

A. \(132 \mathrm{~V}\)
B. \(160 \mathrm{~V}\)
C. \(176 \mathrm{~V}\)
D. \(182 \mathrm{~V}\)