Physics Past Questions and Answers

A machine of velocity ratio 6 requires an effort of 400 N to raise a load of 800 N through I m. Find the efficiency of the machine

A 55. 6 %
B 50.0%
C 33.3%
D 22.2%

Question 7:

If a wire 30 cm long is extended to 30.5 cm by a force of 300 N. find the strain energy of wire

A 0.75 J
B 7.50 J
C 75.00 J
D 750.00 J

Question 8:

In a hydraulic press, the pump piston exerts a pressure of 100 pa on the liquid. what force is exerted in the second piston of cross sectional area 3 m²?

A 300 N
B 200 N
C 150 N
D 100 N

Question 9:

The accurate measurement of the relative density of a substance in its powdered form is done with a beam balance and

A A density bottle
B An eureka can
C A pipette
D A burette

Question 10:

A hydrometer is an instrument used in measuring

A Vapour pressure of a fluid
B Density of liquid
C Relative humidity of a liquid
D Relative density of a liquid