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प्रश्न
Give one example when:
Electric energy changes to mechanical energy.
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उत्तर
In an electric motor, electric energy changes to mechanical energy.
संबंधित प्रश्न
Define calorific value of a fuel.
Give one example of a body that has potential energy, in due to its state.
Name the type of energy (kinetic or potential) possessed by the following:
A stretched rubber band.
Give one relevant example for the following transformation of energy:
Electrical energy to mechanical energy.
A light mass and a heavy mass have equal momentum. Which will have more kinetic energy?
(Hint : Kinetic energy K = P2/2m where P is the momentum.)
Select the renewable and non-renewable sources of energy from the following:
Diesel
Name five renewable sources of energy.
A ball of mass 0.5 kg slows down from a speed of 5m/s-1 to that of 3m/s-1. Calculate the change in kinetic energy of the ball.
What happens to the K.E. when
(i) the mass of the body is doubled at a constant velocity and
(ii) the velocity of the body is doubled at constant mass?
What is the main energy transformation that occur in:
Photosynthesis in green leaves.
