Physics Past Questions and Answers

The image in a pine-hole camera is always

A Diminished
B Enlarged
C Upright
D Inverted
E Blurred

Question 97:

The refractive index of a given transparent medium is 1.4. Which of the following is the minimum internal angle for total internal reflection to take place in the medium?

A 30^o
B 36^o
C 44^o
D 46^o
E 54^o

Question 98:

The distance between a node and an anti-node for a transverse wave is equal to

A The wavelength
B Thrice the wavelength
C One-half of the wavelength
D One-quater of the wavelength
E Three quaters of the wavelength

Question 99:

Which of the following is a stringed instrument?

A Flute
B Trumpet
C Piano
D Drum
E Saxophone

Question 100:

A sound pulse sent vertically downwards into the earth is reflected from two different layers of the earth such that echoes are heard 1.2s and 1.4s. Assuming speed of the pulse is 2000ms^-1, calculate the distance between the layers.

A 200 m
B 400 m
C 2400 m
D 2600 m
E 2800 m