Physics Past Questions and Answers

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 I, II and IV only
B I, II and III only
C I and II only
D II, III and IV only
E L, III and IV only

Question 2332:

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 I only
B II only
C III only
D I and III only
E II and III only.

Question 2333:

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?

A 4.00
B 2.00
C 1.33
D 1.50
E 0.25

Question 2334:

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

A At F
B Beyond C
C Between O and P
D Between P and F
E Between F and C

Question 2335:

A parallel beam of light is to be obtained from the headlamp ofa car. At which of the following positions should the source of light be placed from the pole of its spherical minor?

A At the focal point
B At the centre of curvature
C Beyond the centre of curvature
D Between the focal point and the pole
E Between the focal point and the center of curvature