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

Name three characteristics of a musical sound.

1. Which of the following quality determines the loudness of a sound wave?
   
   1. wavelength
   2. frequency and
   3. amplitude
2. How is loudness related to the quantity mentioned above in part (a)?

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

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

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

How does the wave pattern of a loud note differ from a soft note? Draw a diagram.

Name the unit in which loudness of sound is measured.

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

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

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?