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

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:

How does the medium affect the amplitude of free/natural vibrations of a body?

What are forced vibrations? 

Distinguish between the free (or natural) and forced vibrations.

Give one example to illustrate forced vibrations.

Describe a simple experiment to illustrate the phenomenon of resonance and explain it.

Resonance is a special case of ______ vibrations, when frequency of the driving force is ______ natural frequency of the body.

Differentiate between the forced and resonant vibrations.

Why is a loud sound heard at resonance?

In following figure shows two tuning forks A and B of the same frequency mounted on two separate sound boxes with their open ends facing each other. The fork A is set into vibration.

1. Describe your observation.
2. State the principle illustrated by this experiment.

In following figure shows  A, B, C and D are four pendulums suspended from the same elastic string XY. Lengths of pendulum A and D are equal, while the length of pendulum B is smaller and the pendulum C is longer. The pendulum A is set into vibration.
(a) what is your observation? (b) Give reason for your observation.

A vibrating tuning fork, held over an air column of a given length with its one end closed, produces a loud audible sound. Name the phenomenon responsible for it and explain the observation.

In following figure shows  A, B , C and D represent test tube each of height 20 cm which are filled with water up to heights of 12 cm, 14 cm, 16cm and 18cm respectively. If a vibrating tuning fork is placed over the mouth if test tube D, a loud sound is heard.

1. Describe the observations with the tubes A, B and C when the vibrating tuning fork is placed over the mouth of these tubes.
2. Give the reason for your observation in each case.
3. State the principle illustrated by the above experiment.

When a troop crosses a suspension bridge, the soldiers are asked to break steps. Explain the reason.

Why are the stringed instruments like guitar provided with a hollow sound box?