Physics Past Questions and Answers

The earth is four times the size of the moon and the acceleration due to gravity on the earth is 80 times that on the moon. The ratio of the mass of the moon to that of the earth is

A 1:80
B 1:320
C 1:1280
D 1:4

Question 32:

In which of the following material media will sound travel fastest?

A Oil
B Metal
C Gas
D Water

Question 33:

What types of mirror are capable of producing parallel beams of light such as those arising from the headlamps of a car?

A Parabolic mirrors
B Plane mirrors
C Cylindrical mirrors
D Spherical mirrors

Question 34:

What happens to the rays in a parallel beam of light?

A They diverge as they travel
B They intersect
C They converge as they travel
D They meet at infinity.

Question 35:

A ray of light makes an angle of 35^o with a plane mirror. What is the angle of reflection?

A 35^o
B 55^o
C 70^o
D 65^o