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प्रश्न
Give one disadvantage of using a solar cell.
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उत्तर
One disadvantage of solar cell is listed below:
i. The initial cost of a solar panel is sufficiently high.
संबंधित प्रश्न
Fill in the blank
An object falling freely from the roof of a multistorey building has ________ and _________ energy when halfway down the building.
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A piece of stone placed on the roof.
Why using wood as fuel is not advisable although wood is a renewable source of energy?
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
Name the form of energy in which potential energy can change.
What kind of energy is possessed in a situation when?
A stone, in a stretched catapult.
Give one example when:
Light energy changes to chemical energy.
Give one example when:
Kinetic energy to potential energy.
Give one example when:
Electrical energy to heat energy.
A girl of mass 35 kg climbs up from the first floor of a building at a height 4 m above the ground to the third floor at a height 12 m above the ground. What will be the increase in her gravitational potential energy? [g = 10 ms-2]
