Post Utme Physics Past Questions and Answers

Question 291:

Thermal equilibrium between two objects exists when ____________

A. The temperatures of both objects are equal
B. The quantity of heat in both objects is the same
C. The heat capacities of both objects are the same
D. One object loses heat continuously to the other

Question 292:

In the figure above, the three forces \(F 1, F 2, F 3\) acting at \(O\) are in equilibrium. If the magnitude F1 is \(10.0 \mathrm{~N}\) and the magnitude of F2 is \(5.0 \mathrm{~N}\), find the magnitude of F3.

A. \(26.4 \mathrm{~N}\)
B. \(15.0 \mathrm{~N}\)
C. \(13.2 \mathrm{~N}\)
D. \(10.0 \mathrm{~N}\)

Question 293:

22,000\(]\) of heat is required to raise the temperature of \(1.5 \mathrm{~kg}\) of paraffin from \(20^{\circ} \mathrm{C}\) to \(30^{\circ} \mathrm{C}\).
Calculate the specific heat capacity of paraffin.

A. \(1466 \mathrm{~J} \mathrm{Kg}-1^{\circ} \mathrm{C}-1\)
B. \(2933 \mathrm{~J} \mathrm{Kg}-1^{\circ} \mathrm{C}-1\)
C. \(4400 \mathrm{~J} \mathrm{Kg}-1^{\circ} \mathrm{C}-1\)
D. \(58661 \mathrm{~J} \mathrm{Kg}-1^{\circ} \mathrm{C}-1\)

Question 294:

When white light is dispersed by a spectrometer, the component having the shortest wave length is ____________

A. Orange
B. Green
C. Violet
D. Red

Question 295:

An Object is placed \(5.6 \times 10^{-4}\) \(\mathrm{m}\) in front of a converging lens of focal length \(1.0 \times 10^{-3} \mathrm{~m}\).
The image formed is ____________

A. Real, erect and magnified
B. Virtual, erect and magnified
C. Real, inverted and magnified
D. Virtual, erect and diminished