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प्रश्न
State the energy changes which take place when:
Water stored in dams rotates turbine connected to a dynamo.
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उत्तर
The potential energy of stored water changes to kinetic energy of flowing water, The kinetic energy of the flowing water rotates turbine. The turbine, in turn, rotates the coil of the generator and changes into electric energy.
संबंधित प्रश्न
Give one example to show that the sum of potential energy and kinetic energy remains constant if friction is ignored.
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 ground.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A compressed spring
State two advantages of producing electricity from solar energy.
Identify the type of energy possessed by the body in each of the following:
(a) A coiled spring of the toy car
(b) A hammer which is raised
(c) A stone shot from a catapult
(d) Water stored in the overhead tank
(e) A tadpole moving in water.
State the energy changes which take place when:
A bulb glows, when torchlight is switched on.
Draw a diagram to show the energy changes in an oscillating simple pendulum. Indicate in your diagram how the total mechanical energy in it remains constant during the oscillation.
What ts the original source of energy for the electricity produced at a thermal power station?
