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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.
संबंधित प्रश्न
Select the correct alternatives
A ball rolling on the ground possesses
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A moving cricket ball
Explain the principle of producing electricity using the nuclear energy.
Name two examples in which the mechanical energy of a system remains constant.
What kind of energy is possessed in a situation when?
An electron spinning around the nucleus.
Write the type of energy possessed in the following case:
A bent bow
State the energy changes which take place when:
In a heat engine.
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.
In which states is water found in nature?
