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प्रश्न
State whether a solar cell produces a.c. or d.c.
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उत्तर
Solar cell produces d.c. (direct current).
संबंधित प्रश्न
What name is given to the heat energy obtained from hot rocks inside the earth?
Name the type of energy (kinetic or potential) possessed by the following:
A moving cricket ball.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A moving bus
Select the renewable and non-renewable sources of energy from the following:
Diesel
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?
A cocked up spring of air gun.
What kind of energy is possessed in a situation when?
A fish moving in the water.
Show that in case of a body falling freely under gravity, total mechanical energy remains conserved (neglect air resistance).
A ball of mass 50 g falls from a height of 2m and rebounds from the ground to 1.6 m. Find:
(i) The potential energy possessed by the ball when initially at rest.
(ii) The kinetic energy of the ball before it hits the ground.
(iii) The final potential energy of the ball.
(iv) The loss in kinetic energy of the ball on collision. (Take: g = 10N kg−1)
What is the difference between the solid, liquid, and gaseous states of a substance?
