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प्रश्न
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संबंधित प्रश्न
Name the type of energy (kinetic energy K or potential energy U) possessed in the given case:
A stretched wire
State the energy changes in the following case while in use:
an electric bulb
The following are some of the energy transformations.
A. Electrical to light
B. Work to heat
C. Chemical to light
D. Electrical to sound
E. Mechanical to electrical
Identify the energy transformation that takes place in the following by inserting the corresponding letter in the shape provided.
(i) A candle flame
(ii) A torch is lighted
(iii) A microphone is used in a meeting
(iv) A cycle dynamo
(v) A piece of metal is being filed
What kind of energy is possessed in a situation when?
An electron spinning around the nucleus.
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?
State the energy changes which take place when:
An air gun is loaded and then fired.
State the energy changes which take place when:
Electricity obtained from nuclear energy.
A boy sits and stands repeatedly. Draw a graph showing the variation of potential energy with time.
A body of mass 0.2 kg falls from a height of 10 m to a height of 6 m above the ground. Find the loss in potential energy taking place in the body. [g = 10ms−2]
What is meant by energy?
