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प्रश्न
उत्तर
Whenever one form of energy dissipates or disappears, another form of equivalent amount of energy is produced; this is referred to as transformation of energy.
E.g. when a particular switch is pressed electric lamps light up owing to the heat produced in the filament. This is the transformation of electrical energy to heat and light energy.
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संबंधित प्रश्न
Give one example of a body that has potential energy, in due to its state.
Give one disadvantage of using a solar cell.
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.
Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.
What do you understand by mechanical energy?
State the energy changes which take place when:
A magnesium ribbon burns in air.
Give one example when:
Heat energy changes to kinetic energy.
Give one example when:
Kinetic energy changes to heat energy.
What ts the original source of energy for the electricity produced at a thermal power station?
Nuclear fission is
