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

What determines the pitch of a sound?

Draw a diagram to show the wave pattern of high pitch note and a low pitch note, but of the same loudness.

The frequencies of notes given by flute, guitar and trumpet are respectively 400 Hz, 200 Hz and 500 Hz. Which one of these has the highest pitch?

How does the two sounds of same loudness and same pitch produced by different instruments differ? Draw diagrams to illustrate your answer.

Two identical guitars are played by two persons to give notes of the same pitch. Will they differ in quality? Give a reason for your answer.

1. How would you demonstrate that a momentary current can be obtained by the suitable use of a magnet, a coil of wire and a galvanometer?
2. What is the source of energy associated with the current obtained in part (a)?

1. Describe briefly one way producing an induced e.m.f?
2. State one factor that determines the magnitude of induced e.m.f. in part (a) above.
3. What factor determines the direction of induced e.m.f. in part (a) above?

In which of the following case does the electromagnetic induction occur?

A conductor is moved in a varying magnetic field. Name the law which determines the direction of current induced in the conductor.

What is Lenz’s law?

Why does it become more difficult to move a magnet towards a coil when the number of turns in the coil has been increased?

The direction of induced current is obtained by ______.

How is the boiling point of water affected when some salt is added to it?

It is difficult to cook vegetables on hills and mountains. Explain the reason.

A pressure cooker is based on the principle that boiling point of water increases with the ______.

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 : 
(i) intensities and
(ii) 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.