Physics Past Questions and Answers

The diagram above represents part of a wave motion in air. If the wave travels with a speed of 300ms^-1calculate the frequency of the wave.

Which of the following is/are necessary for the production of interference with two wave trains? I. The sources must be close to each other. II The waves must have the same frequency. III. The waves must have the same amplitude. IV. The waves must travel with the speed of light.

A stone is dropped into the middle of a pool of water. Which of the following statements is/are correct? I, Spherical waves are set up in the water. II. The water moves outwards to the sides of the pool. III. Energy is transmitted outwards from the centre of disturbance

A concave mirror of radius of curvature 20cm has a pin placed at 15cm from its pole. What will be the magnification of the image formed?

Where will the image of the object OB shown in the diagram above be located after reflection from the mirror?