Physics Past Questions and Answers

Explain why sound waves cannot be plane Polarized.

a) Define surface tension.<br/>(b) State two methods by which the surface tension of a liquid can be reduced.

Explain why it is desirable to install an air conditioner near the ceiling of a room and not close to the floor.

(a) On what principle does lighting in a fluorescent tube operate?<br/>(b) State two factors which determine the colour of light produced in a fluorescent tube.

The diagram above illustrates an arrangement of a cathode ray from an electron gun and a bar magnet placed perpendicularly to the direction of the ray. Will the ray bend downward or upward? Explain.