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प्रश्न
State the S.I. unit of energy.
State the SI unit of electrical energy.
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उत्तर
Joule (J)
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संबंधित प्रश्न
When do we say that work is done?
A force acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of the force. What should be the value of θ to get the maximum positive work?
In which of the following cases, is work being done?
(i) A man pushing a wall.
(ii) a coolie standing with a load of 12 kgf on his head.
(iii) A boy climbing up a staircase.
1 J = ______ calorie.
What is the condition for a force to do work on a body?
What happens to the work done when the dispacement of body is at right angles to the direction of force acting on it? Explain your answer.
How many joules are there in 1 mega joule?
Define 'joule'.
On what factors does the work done by a force depend?
Write an expression for work done by a force depends?
How is horse power related to the S. I. unit of power?
In the following case write yes, if the work is being done and no if no work is being done.
A coolie standing with a heavy load on his head
A water pump raises 50 kg of water through a height of 25 m in 5s. Calculate the power supplied by the pump (Take: g = 10 N kg−1).
What is power? How do you differentiate kilowatt from kilowatt-hour? The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of waterfalls from it in a minute. Calculate the equivalent power if all this energy can be utilized? (g = 10 m s–2)
