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प्रश्न
State the energy changes which take place when:
A bulb glows, when torchlight is switched on.
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उत्तर
The chemical energy of cell changes to electric energy. The electric energy first changes to heat and finally to light energy.
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संबंधित प्रश्न
Select the correct alternatives
A ball rolling on the ground possesses
Differentiate between the potential energy (U) and the kinetic energy (K).
Name the energy changes for the following:
bicycle brakes
What happens to the K.E. when
(i) the mass of the body is doubled at a constant velocity and
(ii) the velocity of the body is doubled at constant mass?
State the energy changes which take place when:
An air gun is loaded and then fired.
State the energy changes which take place when:
Water freezes in the freezing chamber of a fridge.
Give one example when:
Chemical energy changes to light energy.
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?
Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.
