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प्रश्न
State the energy changes in the following case while in use:
an electric bulb
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उत्तर
Electrical energy into light energy
संबंधित प्रश्न
State the energy change in the following device while in use:
A loudspeaker
Name the type of energy (kinetic or potential) possessed by the following:
A stretched rubber band.
A body of mass m falls down through a height h. Obtain an expression for the work done by the force of gravity.
What is the main source of energy for earth?
State the energy transformation on the following:
Electricity is obtained from wind energy.
Name a device in which solar energy is converted into electricity state its two uses.
Give one example when:
Light energy changes to chemical energy.
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)
Geothermal energy is:
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A moving bus
