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प्रश्न
Give an example
Light energy changes to electrical energy.
उत्तर
Solar cell
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संबंधित प्रश्न
The energy of a body is its capacity to do .........
A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power of the pump required.
(Take g = 10 N kg-1 and density of water = 1000 kg m-3)
State two disadvantages of producing hydroelectricity.
Fill in the blank with suitable word :
The work done on a body moving in a circular path is __________
A person of mass 50 kg climbs a tower of height 72 metres. Calculate the work done. (g = 9.8 m s−2).
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
Explain the difference between a uniform linear motion and a uniform circular motion.
Nm is the unit of .......
What do you mean by a kilo joule?
Write an expression for the work done against gravity.
Complete the following sentences:
1 H.P. = ........ W.
Fill in the boxe to show the corresponding energy transformation.
Fill in the boxe to show the corresponding energy transformation.
A is a push or a pull ______.
A proton is kept at rest. A positively charged particle is released from rest at a distance d in its field. Consider two experiments; one in which the charged particle is also a proton and in another, a positron. In the same time t, the work done on the two moving charged particles is ______.
A man squatting on the ground gets straight up and stand. The force of reaction of ground on the man during the process is ______.
