Define kilowatt hour.

एका वाक्यात उत्तर

Kilowatt hour is the unit of work.

Since, power × time = work

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पाठ 2: Work, Energy and Power - EXERCISE - 2(A) [पृष्ठ २८]

पाठ 2 Work, Energy and Power
EXERCISE - 2(A) | Q 22.1 | पृष्ठ २८

Select the correct alternatives

The correct statement is

What do you mean by conservation of mechanical energy? State the condition when does it hold.

Name the commercial unit of measurement of energy.

Name two units of power bigger than watt.

Define the term 'watt'.

Name the quantity whose unit is :
(a) kilowatt
(b) kilowatt-hour

If the energy of a ball falling from a height of 10 metres is reduced by 40%, how high will it rebound?

Observe the picture and put a tick (✓) if work is done and put a cross (x) if work is not done.

Which one of the following requires wind energy?

When a body falls freely towards the earth, then its total energy