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प्रश्न
State the energy transformation on the following:
Electricity is obtained from hydro energy.
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उत्तर
Mechanical energy into electrical energy.
संबंधित प्रश्न
Give one example of a body that has potential energy, due to its position at a height.
How is wind energy used to produce electricity?
State two advantages and two disadvantages of using hydro-energy for producing electricity.
State the energy changes which take place when:
A body released from rest from the top of a building.
State the energy changes which take place when:
Water stored in dams rotates turbine connected to a dynamo.
State the energy changes which take place when:
A magnesium ribbon burns in air.
Give one example when:
Chemical energy to electrical energy.
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
A ball of mass 200 g falls from a height of 5 m. What will be its kinetic energy when it just reaches the ground? (g = 9.8 m s−2)
Two bodies, A and B of equal mass are kept at heights 20 m and 30 m respectively. Calculate the ratio of their potential energies.
