Post Utme Physics Past Questions and Answers

Question 1111:

Which of the following is not true about the mechanical energy of a system in a conservative field?

A. Total energy is zero
B. Total energy is the sum of the kinetic energy and the potential energy
C. Total energy is equal to the maximum value of kinetic energy
D. Total energy is equal to the maximum value of potential energy

Question 1112:

Surface tension is the ____________

A. Pressure per unit length on either side of the imaginary line drawn on the liquid surface at rest
B. Force per unit length on either side of the imaginary line drawn on the liquid surface at rest
C. Current per unit length on either side of the imaginary line drawn on the liquid surface at rest
D. Area per unit length on either side of the imaginary line drawn of the liquid surface at rest

Question 1113:

A machine has an efficiency of \(60 \%\). If the machine applied a force of \(2000 N\) to overcome a load of \(5000 N\), calculate the velocity ratio of the machine.

A. 2.4
B. 3.3
C. 4.2
D. 5.5

Question 1114:

Which of the following statements is true about the hydrostatic pressure?
(i) Pressure increases with height
(ii) Pressure is independent of the shape and volume of the vessel
(iii)Pressure is the same at all points on the same horizontal plane in a fluid
(iv)Pressure is independent of the surface area in contact

A. (i), (ii), (iii) and (iv)
B. (i), (ii), and(iii) only
C. (ii), (iii) and (iv) only
D. (i), (ii), and (iv) only

Question 1115:

The resistance of a platinum resistance thermometer is \(160.5 \Omega\) at steam point and \(60.5 \Omega\) at the melting point of Ice.
Calculate the resistance of the thermometer at \(70^{\circ} C\)

A. \(160.5 \Omega\)
B. \(165.5 \Omega\)
C. \(130.5 \Omega\)
D. \(170.5 \Omega\)