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

State the energy changes in the following case while in use:

Washing machine

State the energy changes in the following case while in use:

Burning coal

State the energy changes in the following case while in use:

A solar cell

State the energy changes in the following case while in use:

Bio-gas burner

State the energy changes in the following case while in use:

A petrol engine of a running car

State the energy changes in the following case while in use:

An electromagnet.

A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. What happens to the mechanical energy after the ball hits the ground and comes to rest?

The energy conversion in a washing machine is from ______.

For burning of coal in a thermoelectric station, the energy conversion taking place is:

State the energy changes in the following case while in use:

A glowing electric bulb

State the energy changes in the following case while in use:

An electric cell in a circuit

In an electric cell while in use, the change in energy is from ______.

What do you understand by the conservation of mechanical energy?

A body of mass 10 Kg is kept at a height of 5m. It is allowed to fall and reach the ground.
(i) What is the total mechanical energy possessed by the body at the height of 2m assuming it is a frictionless medium ?
(ii) What is the kinetic energy possessed by the body just before hitting the ground ? Take g = 10 m/s².  

Is it practically possible to convert a form of energy completely into the other useful form? Explain your answer.

What is degraded energy?

Explain the degradation of energy by taking one example of your daily life.

The conversion of part of energy into an undesirable form is called ______.

State the principle of conservation of energy.

A pendulum is oscillating on either side of its rest position. Explain the energy changes that takes place in the oscillating pendulum. How does the mechanical energy remains constant in it? Draw the necessary diagram.