Post Utme Physics Past Questions and Answers

Question 266:

A tap supplies water at \(25^{\circ} \mathrm{C}\) while another supplies water at \(75^{\circ} \mathrm{C}\). If a man wishes to bathe with water at \(40^{\circ} \mathrm{C}\), the ratio of the mass of cold water to the mass of hot water required is ____________

A. \(1: 3\)
B. \(15: 8\)
C. \(7: 3\)
D. \(3: 1\)

Question 267:

An object is placed \(10 \mathrm{~cm}\), in front of a concave mirror of focal length \(15 \mathrm{~cm}\). What is the positive and nature of the image formed?

A. \(30 \mathrm{~cm}\) and virtual
B. \(6 \mathrm{~cm}\) and real
C. \(6 \mathrm{~cm}\) and virtual
D. \(30 \mathrm{~cm}\) and real

Question 268:

2 When the tension of a sonometer wire is doubled, the ratio of the new frequency to the initial frequency is ____________

A. \(1 \sqrt{2}\)
B. 12
C. \(\sqrt{2}\)
D. 2

Question 269:

A short response time is obtained in a liquid-in-glass thermometer when the ____________

A. Stem is long and thin
B. Bulb is large and thick-walled
C. Bulb is small and thick-walled
D. Liquid is of high density and the bore is large
E. Bulb is thin-walled and the liquid is a good conductor of heat

Question 270:

In the figure above, the value of \(R\) is ____________

A. \(3 \Omega\)
B. \(4 \Omega\)
C. \(5 \Omega\)
D. \(6 \Omega I\)