ICSE ICSE Class 8 - CISCE Question Bank Solutions for Physics

In a piano, pitch is decreased by

How does sound travel in air?

What is longitudinal wave?

A switch is connected to the .......... wire.

Explain the mechanism of the formation of a longitudinal wave when the source vibrates in the air.

The red colour insulated wire in a cable is the .............. wire.

Define the following term:

Frequency

Obtain relationship between the time period and frequency.

Name three characteristics of a musical sound.

A fuse wire should have low .................

Which of the following determines the loudness of a sound wave?

How is loudness related to the amplitude of wave?

If the amplitude of a wave is doubled, what will be the effect on its loudness?

Name the unit in which the loudness of sound is expressed.

Why is the loudness of sound heard by a plucked wire increased when mounted on a sound board?

State three factors on which loudness of sound heard by a listener depends.

Name the characteristic of sound related to its frequency

Name and define the characteristic which enables one to distinguish two sounds of same loudness, but of different frequencies, given by the same instrument.

All wires used in electric circuits should be covered with

Standing at a distance, how is it possible to detect the filling of bucket under a water tap by hearing the sound?