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प्रश्न
Write true or false of the following statement.
There is always some loss of energy in conversion from one form of energy to another form, so the total energy is not conserved.
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उत्तर
This statement is false.
Explantion:
There is always some loss of energy in conversion from one form of energy to the other form, so the total energy is conserved.
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संबंधित प्रश्न
A certain form of energy which is not sourced directly or indirectly from the sun and does not cause any pollution is very easily converted into electricity. This form of energy is, however, not available everywhere. Moreover, it is technically very difficult and expensive to obtain it. Name the form of energy.
Can a body possess energy even when it is not in motion ? Explain your answer with an example.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A moving bus
What is tidal? Explain in brief.
How is the solar energy used to generate electricity in a solar power plant?
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).
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:
Kinetic energy changes to heat energy.
Give one example when:
Electric energy changes to sound energy.
Give one example when:
Mechanical energy changes to electric energy.
