Advertisements
Advertisements
प्रश्न
State the energy changes in the following while using a microphone.
उत्तर
A microphone - sound energy to electrical energy
APPEARS IN
संबंधित प्रश्न
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in a loaded truck when started and set in motion.
State the energy changes in the following case while in use:
loudspeaker
State the energy changes in the following case while in use:
Washing machine
State the energy changes in the following case while in use:
A solar cell
Explain conservation of energy.
The power of a motor pump is 2 kW. How much water per. the minute the pump can raise to a height of 10 m? (Given g = 10m s−2)
Is it possible that an object is in a state of accelerated motion due to external force acting on it, but no work is being done by the force? Explain it with an example.
Four men lift a 250 kg box to a height of 1 m and hold it without raising or lowering it.
(a) How much work is done by the men in lifting the box?
(b) How much work do they do in just holding it?
(c) Why do they get tired while holding it? (g = 10 m s–2)
For burning of coal in a thermoelectric station, the energy conversion taking place is:
In an electric cell while in use, the change in energy is from ______.
