Post Utme Physics Past Questions and Answers

Question 701:

A block and tackle system is sued to lift a load of 20N through a vertical height of 10m. If the efficiency of the system is 40%, how much work is done against friction?

A. 80J
B. 120J
C. 300J
D. 500J

Question 702:

The saturated vapour pressure of a liquid increases as the ____________

A. Volume of the liquid increases
B. Volume of the liquid decreases
C. Temperature of the liquid increases
D. Temperature of the liquid decrease

Question 703:

The absolute temperature of a perfect gas proportional to the average

A. Potential energy of the molecules
B. Separation between the molecules
C. Kinetic energy of the molecule
D. Velocity of the molecules

Question 704:

A room is heated by means of charcoal fire. All occupants of the room standing away from the fires is warmed mainly by ____________

A. Convection
B. Radiation
C. Conduction
D. Reflection

Question 705:

A boy timed 30 oscillations of a certain pendulum thrics and obtained 1 min. 10s 1min, 10s min 12s and 1min 7s respectively.
The mean period of the pendulum is ____________

A. 0.14s
B. 0.43
C. 2.35
D. 6.97s