Please select a subject first
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What kind of energy is possessed in a situation when?
Water stored in dams.
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What kind of energy is possessed in a situation when?
An electron spinning around the nucleus.
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What kind of energy is possessed in a situation when?
A shooting arrow.
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What kind of energy is possessed in a situation when?
A stone, in a stretched catapult.
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Obtain an expression for the potential energy of a body of mass m at a height h above the ground.
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What happens to the K.E. when
(i) the mass of the body is doubled at a constant velocity and
(ii) the velocity of the body is doubled at constant mass?
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Write the type of energy possessed in the following case:
A bent bow
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Write the type of energy possessed in the following case:
A falling apple
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Write the type of energy possessed in the following case:
A wound-up spring
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Write the type of energy possessed in the following case:
A moving cricket ball.
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Give three examples of bodies possessing potential energy.
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What is dissipation of energy?
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State the energy changes which take place in Electricity is obtained from solar energy.
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What is the main energy transformation that occur in:
Photosynthesis in green leaves.
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What is the main energy transformation that occur in:
Charging of a battery.
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Name the two groups in which various sources of energy are classified?
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Give two examples each of renewable and non-renewable sources of energy?
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Name a device in which solar energy is converted into electricity state its two uses.
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How much hydro-electric power is generated in India?
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State two advantages and two disadvantages of using hydro-energy for producing electricity.
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