Physics Past Questions and Answers

(a) State two factors which affect the mass of elements deposited during electrolysis.
(b) List two non-electrolysis.

(a) Differentiate between plane polarization and interference as applied to waves.
(b) List two uses of polaroids.

(a) List two examples each of substances with:
(i) low viscosity;
(ii) high viscosity.
(b) When is a liquid said to be viscostatic?

State one reason each why cathode rays:
(a) are not electromagnetic waves;
(b) cast sharp shadows of objects in their path;
(c) can rotate a light paddle wheel inside a discharge tube.

An X-ray tube operates at a potential of 2500 V. If the power of the tube is 750 W, calculate the speed of the electron striking the target. [e = 1.6 x 10\(^{-19}\) C; mass of electron = 9.1 x 10\(^{-3}\) kg]