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प्रश्न
Name the device or machine which convert :
Light energy into electrical energy.
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उत्तर
A solar cell converts light energy into electrical energy.
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संबंधित प्रश्न
A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. Taking g = 10 m s−2, calculate:
- the potential energy possessed by the ball when it is initially at rest.
- the kinetic energy of the ball just before it hits the ground?
What kind of energy is possessed by the following?
A running car ____________
What type of energy is possessed : by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
Give two examples where a body possesses both, kinetic energy as well as potential energy.
Name the device or machine which convert :
Heat energy into kinetic energy (or mechanical energy).
A ball falls to the ground as shown below :
What is the potential energy of ball at B?
A microphone converts :
In the case of negative work, the angle between the force and displacement is
A body of mass 10 kg at rest is acted upon simultaneously by two forces 4 N and 3 N at right angles to each other. The kinetic energy of the body at the end of 10 s is
