(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

The boiling point of water is defined as ______.

A man playing a flute is able to produce notes of different frequencies. If he closes the holes near his mouth, will the pitch of the note produced, increase or decrease? Give a reason.

Two waves of the same pitch have amplitudes in the ratio 1 : 3. What will be the ratio of their:

1. intensities and
2. frequencies

It is observed that during march-past we hear a base drum distinctly from a distance compared to the side drums.
(i) Name the characteristics of sound associated with the above obervation.
(ii) Give a reason for the above observation.

Explain the following and illustrate your answer by drawing appropriate diagram:
Frequency

Explain the following and illustrate your answer by drawing appropriate diagram:

Loudness

Explain the following and illustrate your answer by drawing appropriate diagram:

Pitch

Explain the following and illustrate your answer by drawing appropriate diagram:

Quality of a musical note.

Name musical instrument, one in each case, which produces its notes by using the following. In each case state the method used to produce notes of different pitches and loudness.
(a) A vibrating string.
(b) A vibrating column air.
(c) Vibration of any other body.

Give scientific reason for the following:
When a nail is hammering appears to get higher and higher in pitch.

Give scientific reason for the following: 

Windows sometimes rattle when the low notes of a pipe organ are sounded.

The diagram in shows a coil of several turns of copper wire near a magnet NS. The coil is moved in the direction of arrow shown in the diagram.

1. In what direction does the induced current flow in the coil?
2. Name the law used to arrive at the conclusion in part (i).
3. How would the current in coil be altered if
   1. the coil has twice the number of turns,
   2. the coil was made to move three times fast?

Why are the alpha particles not used in radio therapy?