Post Utme Physics Past Questions and Answers

Question 966:

The expansion of solid can be considered a disadvantege in the ____________

A. Fire alarm system
B. Thermostat
C. Riveting of steel plates
D. Balance wheel of a watch
E. Fitting of wheels on rims

Question 967:

A solid metal cube of side \(10 cm\) is heated from \(10^{\circ} C\) to \(60^{\circ} C\)
if the linear expansivity of the metal is \(1.2 \times 10^{-5} K ^{-1}\), calculate the increase in its vorlume ____________

A. \(0.6 cm ^{8}\)
B. \(1.2 cm ^{3}\)
C. \(1.8 cm ^{3}\)
D. \(3.6 cm ^{3}\)
E. \(6.0 cm ^{3}\)

Question 968:

A gas has a volume of \(546 cm ^{\circ}\) at \(0^{\circ} C\).
What is the volume of the gas at-100 \(C\) if its pressure remains constant?

A. \(346 cm ^{3}\)
B. \(446 cm ^{3}\)
C. \(546 cm ^{3}\)
D. \(646 cm ^{3}\)
E. \(746 cm ^{3}\)

Question 969:

An image which clannot be formed on a screen is said to be ____________

A. Inverted
B. Real
C. Virtual
D. Erect
E. Blurred

Question 970:

Longitudinal waves cannot be ____________

A. Diffracted
B. Refracted
C. Polarized
D. Reflected
E. Superposed