Physics Past Questions and Answers

State (a) the principle upon which the lightening in fluorescent tubes operate;
(b) two factors on which the colour of light from a fluorescent tube depends.

(a) Define Young modulus of elasticity;
(b) A spiral spring extends from a length of 10.0 cm to 10.01 cm when a force of 20 N is applied on it. Calculate the force constant of the spring.

(a) Define elastic limit
(b) State Hookes laws of elasticity

(a) Define surface tension
(b) State two methods by which the surface tension of a liquid can be reduced

Using the kinetic theory of matter, explain the definite structure of solids.