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प्रश्न
State the energy transformation on the following:
Electricity is obtained from wind energy.
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उत्तर
Mechanical energy into electrical energy.
संबंधित प्रश्न
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A compressed spring
Name six different forms of energy?
Why using wood as fuel is not advisable although wood is a renewable source of energy?
State two advantages and disadvantages of using nuclear energy for producing electricity.
State the energy changes which take place when:
A bulb glows, when torchlight is switched on.
State the energy changes which take place when:
Water freezes in the freezing chamber of a fridge.
Give one example when:
Heat energy changes to kinetic energy.
Show that in case of a body falling freely under gravity, total mechanical energy remains conserved (neglect air resistance).
A moving body weighing 400 N possesses 500 J of kinetic energy. Calculate the velocity with which the body is moving. (g = 10 ms2)
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)
