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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
Write the formula for work done on a body when the body moves at an angle to the direction of force. Give the meaning of each symbol used.
Give one example each in which a force does (a) positive work (b) negative work, and (c) zero work.
Fill in the boxe to show the corresponding energy transformation.
A man climbs a slope and another walks same distance on level road. Which of the two expends more energy and why?
How long should an electric motor, of power 2 H.P. operate, so as to pump 5 m3 of water from a depth of 15m. [Take g = 10 N kg−1]
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A wind-mill is lifting water from a well.
