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प्रश्न
Name the material commonly used for the manufacturing of solar cells.
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उत्तर
Silicon and Gallium. Solar cell produces d.c. current. State whether a solar cell produces a.c. or d.c. current.
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संबंधित प्रश्न
In each of the following a force, F is acting on an object of mass, m. The direction of displacement is from west to east, as shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative, positive or zero.
A force of 30 N acts on a body and moves it through a distance of 5 m in the direction of force. Calculate the work done by the force.
Name the physical quantity whose SI unit is Nm.
Define 'joule'.
Can work done be zero even if force acts on the body?
Name the physical quantity whose MKS units are kgm2s-3.
A body of mass 60 kg has the momentum 3000 kgm/s-1. Calculate: the speed of the body.
State the amount of work done by an object when it moves in a circular path for one complete rotation. Give a reason to justify your answer.
A is a push or a pull ______.
