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

A truck weighing 1000 kgf changes its speed from 36 km h^-1 to 72 km h^-1 in 2 minutes. Calculate:

1. the work done by the engine and
2. its power (g = 10 m s^-2)

A body of mass 60 kg has the momentum 3000 kg m s^-1. Calculate:

1. the kinetic energy.
2. the speed of the body.

How much work is needed to be done on a ball of mass 50 g to give it a momentum of 5 kg cm s^-1?

Show by a ray diagram that a diverging lens cannot form a real image of an object placed anywhere on its principal axis.

A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?

A body falls freely under gravity from rest. Name the kind of energy it will possess on reaching the ground.

Two bodies have masses in the ratio 5 : 1 and their kinetic energies are in the ratio 125 : 9. Calculate the ratio of their velocities.

(i) Define resonant vibrations. 
(ii) Which characteristic of sound, makes it possible to recognize a person by his voice without seeing him?

Two pendulums C and D are suspended from a wire as shown in the figure give below. Pendulum C is made  to oscullate by displaying it from its mean position. It is seen that D also starts oscillating. 

(i) Name the type of oscillation, C will execute.
(ii) Name the type of oscillation, D will execute.
(iii) If the length of D is made equal to C then what difference will you notice in the oscillations of D ?
(iv) What is the name of the phenomenon when the length of D is made equal to C ?

What do you understand by the kinetic energy of a body?

Which of the following quantity remains constant in a uniform circular motion?

In fig. , P, Q, R and S represent test tubes each of height 20 cm which are filled with water upto heights of 10 cm, 14 cm, 16 cm and 18 cm respectively. If a vibrating tuning fork is placed over the mouth of test tube Q, a loud sound is heard.
(i) Describe the observations with the tubes P, R and S.
(ii) Give the reason for your observation in each case.
(iii) State the principle illustrated by the above experiment.

In fig. shows two tuning forks P and Q of the same frequency mounted on separate sound boxes with their open ends facing each other. The fork A is set into vibration. (i) Describe your observation. (ii) State the principle illustrated by this experiment.

In Fig. A, B, C and D are four pendulums suspended from the same elastic string XY. The lengths of pendulum A and D are equal, while the length of pendulum B is shorter and of the pendulum C is longer. Pendulum A is set into vibrations.

1. What is your observation about the vibrations of pendulum D?
2. Give reason for your observation in part (a).
3. What type of vibrations take place in pendulums Band C?
4. Give reason for the answer in part (c).

Differentiate  between the following: 
Light and sound waves.

Differentiate  between the following: 

Free and forced vibrations.