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प्रश्न
Give one relevant example for the following transformation of energy :
Electrical energy to light energy.
उत्तर
Tube light and bulbs.
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संबंधित प्रश्न
Explain how, geothermal energy is used to generate electricity.
Give one example of a body that has potential energy, due to its position at a height.
A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is at the highest point .
Show that the quantity 2K/v2 has the unit of mass, where K is the kinetic energy of the body.
State the energy changes which take place when:
In a heat engine.
State the energy changes which take place when:
Water freezes in the freezing chamber of a fridge.
Give one example when:
Mechanical energy to heat energy.
A girl of mass 35 kg climbs up from the first floor of a building at a height 4 m above the ground to the third floor at a height 12 m above the ground. What will be the increase in her gravitational potential energy? [g = 10 ms-2]
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)
Can you tell?
Describe one natural chain of transformation of energy.
