Physics Past Questions and Answers

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 42:

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 43:

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 44:

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

Question 45:

One special advantage of alcohol over mercury as a thermometric liquid is its

A Low density
B Low freezing point
C High specific
D Low boiling point