10th Class Physics MCQS Chapter 2

To hear echoes, the minimum distance of the obstacle from source of sound should be:

20 m

17 m

15 m

10 m

Which form of energy is sound?

Thermal

Electrical

Mechanical

Chemical

the distance between two consecutive trough or crest is called:

amplitude

time period

frequency

wavelength

The intensity of lawn mover is:

10 ¹ wm ²

10 ³wm ²

10^-2wm^-2

10 ¹wm ³

Time period is reciprocal of:

Amplitude

Frequency

Wave length

Cycle

Pitch of sound depends upon:

Time period

Amplitude

Intensity

Frequency

The difference between the loudness of faintest audible sound and loudness of another sound is called:

Quality of sound

Pitch of sound

Sound level

Intensity of sound

The water waves obey the laws of:

All of these

Refraction

Diffraction

Reflection

After how much time the echo must be heard?

0.1 s

0.10 s

0.20 s

0.50 s

the number of waves passing through a point in one second is called

time period

cycle

frequency

amplitude