Chapter 1 Mcqs - Waves

Question 1

A mass spring system has mass m attached to spring. What will be effect on its time period if its mass is increased four times?

Answer 1

becomes double

Question 2

A spring is stretched 5 cm by 20 N. force, what is its spring constant k?

Answer 2

400 NM-1

Question 3

If amplitude of simple pendulum is doubled, what happens to its time period?

Answer 3

remains same

Question 4

Time period of simple pendulum will be smallest at

Answer 4

Poles

Question 5

If a body performing simple harmonic motion completes one vibration in 2 seconds, its frequency of vibration is

Answer 5

0.5 Hz

Question 6

360 waves are passing through a point in a river in one hour, time period of the wave is

Answer 6

10 s

Question 7

Time period of electrical vibrator of ripple tank is 0.5 s, water waves in ripple tank have a speed of 10 ms-1 and amplitude of 5 cm. The frequency of the waves is

Answer 7

2 Hz

Question 8

Which of the following is a longitudinal wave?

Answer 8

Sound

Question 9

When water enters from deep water to shallow water

Answer 9

speed of water decreases

Question 10

listening too radio transmissions in deep valleys of mountain areas is due to

Answer 10

diffraction of waves