Advertisements
Advertisements
प्रश्न
State the energy changes in the following case while in use:
Bio-gas burner
Advertisements
उत्तर
Chemical energy into heat energy.
APPEARS IN
संबंधित प्रश्न
State the energy changes in the following while in use A loudspeaker .
State the energy changes that occur in the following :
The unwinding of a watch spring.
State the energy changes in the following case while in use:
loudspeaker
State the energy changes in the following case while in use:
Microphone
State the energy changes in the following case while in use:
A solar cell
State the energy changes in the following case while in use:
An electromagnet.
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.
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:
