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प्रश्न
Give one example when:
Mechanical energy changes to electric energy.
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उत्तर
In an electric generator, the mechanical energy changes to electric energy.
संबंधित प्रश्न
A cyclist doubles his speed. How will his kinetic energy change: increase, decrease or remain same ?
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A compressed spring
What do you understand by the kinetic energy of a body?
Select the renewable and non-renewable sources of energy from the following:
Diesel
State two advantages and two disadvantages of using hydro-energy for producing electricity.
State the energy changes which take place when:
Water freezes in the freezing chamber of a fridge.
A ball of mass 50 g falls from a height of 2m and rebounds from the ground to 1.6 m. Find:
(i) The potential energy possessed by the ball when initially at rest.
(ii) The kinetic energy of the ball before it hits the ground.
(iii) The final potential energy of the ball.
(iv) The loss in kinetic energy of the ball on collision. (Take: g = 10N kg−1)
In a hydroelectric power station, 1000 kg of water is allowed to drop through a height of 100 m in 1 sec. If the conversion of potential energy to electric energy is 60%. Calculate the power output. [Take: g = 10m/sec2]
You might have seen some beautiful fireworks during Diwali. It is an example of the transformation of ______ energy into ______ energy.
