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

State the energy transformation on the following:

Electricity is obtained from wind energy.

State the energy transformation on the following:

Electricity obtained from hydro energy.

Give one example when:

Heat energy changes to kinetic energy.

Give one example when:

Kinetic energy changes to heat energy.

Give one example when:

Sound energy changes to electric energy.

Give one example when:

Electric energy changes to sound energy.

Give one example when:

Light energy changes to chemical energy.

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).