Advertisements
Advertisements
प्रश्न
State the energy changes that occur in the following :
Lighting of a torch bulb.
Advertisements
उत्तर
Chemical energy into light and heat energy.
APPEARS IN
संबंधित प्रश्न
State the energy changes that occur in the following :
An electric generator (or dynamo).
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in a car going uphill.
State the energy changes in the following case while in use:
loudspeaker
State the energy changes in the following case while in use:
A petrol engine of a running car
Avinash can run with a speed of 8 m s–1 against the frictional force of 10 N, and Kapil can move with a speed of 3 m s–1 against the frictional force of 25 N. Who is more powerful and why?
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.
Can any object have mechanical energy even if its momentum is zero? Explain.
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.
State the energy changes in the following case while in use:
A glowing electric bulb
In an electric cell while in use, the change in energy is from ______.
