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प्रश्न
Give an example
Electrical energy changes to heat energy.
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उत्तर
Electric iron
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संबंधित प्रश्न
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?
When is work said to be done by a force?
Differentiate between energy and power.
Define 1 joule of work.
The work done on an object does not depend on ______.
Complete the following sentences:
1 H.P. = ........ W.
What do you understand by ‘potential energy’? Give three examples to illustrate your answer.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Food grains are getting dried in the sun.
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.
