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प्रश्न
State the energy changes which take place when:
A magnesium ribbon burns in air.
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उत्तर
During the burning of magnesium, chemical energy changes to heat and light energy.
संबंधित प्रश्न
Name five different forms of energy.
State the energy changes in the following case while in use:
an electric toaster.
Name three non-renewable sources of energy.
State the energy transformation on the following:
Electricity is obtained from wind energy.
State the energy transformation on the following:
Electricity is obtained from hydro energy.
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).
How much hydro-electric power is generated in India?
State the energy changes which take place when:
In a heat engine.
Give one example when:
Electric energy changes to potential energy.
