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प्रश्न
Give one example when:
Electric energy changes to sound energy.
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उत्तर
When a loudspeaker works, the electric energy changes to sound energy.
संबंधित प्रश्न
A boy of mass m climbs up a staircase of vertical height h.
(a) What is the work done by the boy against the force of gravity?
(b) What would have been the work done if he uses a lift in climbing the same vertical height?
State two characteristic which a source of energy must have.
Select the renewable and non-renewable sources of energy from the following:
Wood
Give one disadvantage of using a solar cell.
Two bodies A and B of masses m and M (M ≫ m) have same kinetic energy. Which body will have more momentum?
A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:
The total energy possessed by the body at any instant? (Take g = 10 ms-2).
What do you understand by mechanical energy?
What is the main energy transformation that occur in:
Charging of a battery.
Name the two groups in which various sources of energy are classified?
What is nuclear energy? Explain the principle of producing electricity using nuclear energy is a nuclear reactor.
