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

In the following diagram an arrow shows the motion of the coil towards the bar magnet.
(1) State in which direction the current flows, A to B or B to A?
(2) Name the law used to come to the conclusion.

A person is standing at the seashore. An observer on the ship which is anchored in between a vertical cliff and the person on the shore fires a gun. The person on the shore hears two sounds, 2 seconds and 3 seconds after seeing the smoke of the fired gun. If the speed of sound in the air is 320 ms-1 then calculate:

1) the distance between the observer on the ship and the person on the shore.

2) the distance between the cliff and the observer on the ship.

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

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

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.

State how are the two resistors joined with a battery when equivalent resistance is less than either of the two resistances.

State how are the two resistors joined with a battery when potential difference is same across each resistor.