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प्रश्न
State the energy changes which take place when:
A battery lighting up a bulb.
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उत्तर
The electrical energy changes into heat energy and light energy.
संबंधित प्रश्न
Name the type of energy (kinetic or potential) possessed by the following:
Water flowing in a river.
A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is just in the middle .
A boy of mass m climbs up a staircase of vertical height h.
(a) What is the work done by the boy against the force of gravity?
(b) What would have been the work done if he uses a lift in climbing the same vertical height?
State four ways for the judicious use of energy.
Name the energy changes for each of the following cases:
dynamo
What kind of energy is possessed in a situation when?
A horse running along a level road
Write the type of energy possessed in the following case:
A bent bow
State the energy changes which take place when:
A body thrown vertically upwards from the ground.
Show that in case of a body falling freely under gravity, total mechanical energy remains conserved (neglect air resistance).
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A moving cricket ball
