Physics Quiz For SSC Exams

1. When we hear a sound, we can identify its source form
(a) wave length of sound
(b) the overtones present in the sound
(c) the intensity of sound
(d) the amplitude of sound

2. Velocity of sound in air
(i) increase with temperature
(ii) decreases with temperature
(iii) increase with pressure
(iv) is independent of pressure
(v) is independent of pressure
(a) only (i) and (ii) are true
(b) only (ii) and (iv) are true
(c) only (i) and (iii) are true
(d) only (i) and (iv) are true

3. Beats occur because of 
(a) interference
(b) reflection
(c) refraction
(d) Doppler effect

4. The types of waves produced in a sonometer wire are
(a) transverse progressive 
(b) transverse stationary 
(c) longitudinal progressive
(d) longitudinal stationary

5. With the increase in temperature, the frequency of the sound from an organ pipe
(a) decreases 
(b) increases
(c) remain unchanged
(d) changes erractically

6. Stationary waves of frequency 300 Hz are formed in a medium in which the velocity of sound is 1200 m/s. The distance between a node and the neighbouring anti node is 
(a) 1 m
(b) 2 m
(c) 3 m
(d) 4 m

7. In a stationary longitudinal wave, nodes are points of 
(a) maximum pressure 
(b) minimum pressure 
(c) minimum pressure variation
(d) maximum pressure variation

8. When two sound waves are superimposed, beats are produced when they have
(a) different amplitudes and phases 
(b) different velocities
(c) different velocities
(d) different frequencies

9. Two waves of the same frequency and intensity superimpose with each other in opposite phases. Then after superposition the
(a) intensity increases to four times
(b) intensity increases to two times
(c) frequency increase to four times
(d) none of the above

10. If the ratio of the amplitudes of two waves is 4 : 3, then the ratio of maximum and minimum intensity is 
(a) 16 : 9 
(b) 1 : 16
(c) 1 : 49
(d) 49 : 1


Answers Key
1.(b)
2.(d)
3.(a)
4.(b)
5.(b)
6.(a)
7.(d)
8.(d)
9.(d)

10.(d