Sound

Sound Worksheet-1

1. When we say 'sound travels in a medium' we mean ______.

(a) The particles of the medium travel

(b) The source travels

(c) The disturbance travels

(d) The medium travels

2. The speed of sound in solid, liquid and gas can be correctly compared as:

(a) solid > liquid > gas                (b) liquid > gas > solid

(c) liquid > solid > gas                (d) gas > liquid > gas

Sound Worksheet-2

1. A to and fro motion by an object is also called:

(a) periodic motion                      (b) oscillatory motion

(c) cyclic motion                           (d) none of these

2. An object oscillates 50 times in one second. What would be its frequency?

(a) 0.2hz            (b) 0.02hz         (c) 0.002 hz      (d) 50Hz

Sound Worksheet-3

1. Birds produce sound by using:

(a) vocal chord                              (b) Larynx

(c) Glottis                                       (d) Syrix

2. A source is producing 15 oscillations (waves) in 3 seconds. Find its freque­ncy?

(a) 15 Hz            (b) 5Hz               (c) 0.2 Hz          (d) 0.66 Hz