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

State one important property of waves used for echo depth sounding.

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.

Why is the motion of a body moving with a constant speed around a circular path said to be accelerated?

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.

Earth moves around the sun with uniform velocity.

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.

Explain the meaning of uniform circular motion. Give one example of such motion.

Draw a neat labelled diagram for a particle moving in a circular path with a constant speed. In you diagram show the direction of velocity at any instant.

Is it possible to have an accelerated motion with a constant speed? Name such type of motion.

Give an example of motion in which speed remains uniform, but the velocity changes.

A uniform circular motion is an accelerated motion. Explain it. State whether the acceleration is uniform or variable? Name the force responsible to cause this acceleration. What is the direction of force at any instant? Draw a diagram in support of your answer.

Differentiate between uniform linear motion and uniform circular motion.

A piece of stone tied at the end of a thread is whirled in a horizontal circle with uniform speed by hand. Answer the following questions:

1. Is the velocity of stone uniform or variable?
2. Is the acceleration of stone uniform or variable?
3. What is the direction of acceleration of stone at any instant?
4. Which force provides the centripetal force required for circular motion?
5. Name the force and its direction which acts on the hand.

1. What will be your observation when you are standing outside the disc? Explain.
2. What will be your observation when you are standing at the centre of the disc? Explain.

State True or False

The earth moves around the sun with a uniform.

The motion of the moon around the earth in a circular path is an accelerated motion.

A uniform linear motion is unaccelerated, while a uniform circular motion is an accelerated motion.

In a uniform circular motion, the speed continuously changes because of the direction of motion changes.

Which of the following quantity remains constant in uniform circular motion: