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प्रश्न
State the energy changes which take place when:
A battery lighting up a bulb.
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उत्तर
The electrical energy changes into heat energy and light energy.
संबंधित प्रश्न
Give one example of a body that has potential energy, due to its position at a height.
State two characteristic which a source of energy must have.
Select the renewable and non-renewable sources of energy from the following:
Wood
Name three non-renewable sources of energy.
Name two examples in which the mechanical energy of a system remains constant.
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s−2).
What do you understand by mechanical energy?
State the energy changes which take place when:
A toy car spring is wound and car is made to run on level floor.
Give one example when:
Electric energy changes to potential energy.
The solar cooker is an application of the ______ energy of the sun, while solar cells, solar lamps are applications of the ______ energy of the sun.
