Physics
Whenever mechanical energy changes to other forms, it is always in the form of …………… energy and not in the form of …………… energy.
- potential, kinetic
- heat, potential
- kinetic, potential
- potential, heat
Work, Energy & Power
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Answer
kinetic, potential
Reason — Whenever mechanical energy changes to other forms, it is always in the form of kinetic energy and not in the form of potential energy i.e., the stored potential energy first changes to kinetic energy and then kinetic energy changes to the other forms.
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1 kWh is equal to :
- 746 Н.Р.
- 3.6 x 10-6 J
- 3.6 Ј
- 3.6 x 106 J
Assertion (A) : The power spent in doing a work remains the same, even if the same work is done in a lesser time.
Reason (R) : The power spent by a source depends on the time taken by the source to do that work.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true and R is not the correct explanation of A
- Assertion is true but reason is false
- Assertion is false but reason is true