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

Give one example when:

Chemical energy changes to light energy.

Give one example when:

Electric energy changes to mechanical energy.

Give one example when:

Mechanical energy changes to electric energy.

Give one example when:

Potential energy changes to electric energy.

Give one example when:

Electric energy changes to potential energy.

Give one example when:

Mechanical energy to heat energy.

Give one example when:

Kinetic energy to potential energy.

Give one example when:

Electrical energy to heat energy.

Give one example when:

Chemical energy to electrical energy.

A boy sits and stands repeatedly. Draw a graph showing the variation of potential energy with time.

Draw a diagram to show the energy changes in an oscillating simple pendulum. Indicate in your diagram how the total mechanical energy in it remains constant during the oscillation.

What is the form of that graph between
(i) K.E. and velocity for a constant mass?
(ii) K.E. and mass for a constant velocity?

Show that in case of a body falling freely under gravity, total mechanical energy remains conserved (neglect air resistance).

What is nuclear energy? Explain the principle of producing electricity using nuclear energy is a nuclear reactor.

Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.

A girl of mass 35 kg climbs up from the first floor of a building at a height 4 m above the ground to the third floor at a height 12 m above the ground. What will be the increase in her gravitational potential energy? [g = 10 ms^-2]

A body of mass 0.2 kg falls from a height of 10 m to a height of 6 m above the ground. Find the loss in potential energy taking place in the body. [g = 10ms⁻²]

A ball of mass 200 g falls from a height of 5 m. What will be its kinetic energy when it just reaches the ground? (g = 9.8 m s⁻²)

Two bodies, A and B of equal mass are kept at heights 20 m and 30 m respectively. Calculate the ratio of their potential energies.

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