Advertisements
Advertisements
प्रश्न
State the energy changes in the following while using an electric motor.
Advertisements
उत्तर
An electric motor - Electrical energy to mechanical energy.
APPEARS IN
संबंधित प्रश्न
State the energy changes that occur in a watch spring while it unwinds.
State the energy changes in the following while in use An electric bulb.
Fill in the blank
Green plants convert _________ energy into chemical energy.
State the energy changes that occur in the following :
Burning coal while operating a steam engine.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in the burning of a match stick.
State the energy changes in the following case while in use:
Microphone
State the energy changes in the following case while in use:
An electromagnet.
A boy is moving on a straight road against a frictional force of 5 N. After travelling a distance of 1.5 km he forgot the correct path at a roundabout (Fig. 11.1) of radius 100 m. However, he moves on the circular path for one and half-cycle and then he moves forward up to 2.0 km. Calculate the work done by him.

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.
