Advertisements
Advertisements
प्रश्न
State the energy changes which take place when Water stored in the dam is used to turn turbine in dynamo.
Advertisements
उत्तर
P.E (water stored in the dam) → K.E (falling water) → Electrical energy (Generators of turbine form electrical energy).
APPEARS IN
संबंधित प्रश्न
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A sailboat is moving due to wind energy.
Power spent by a body depends on the time for which it does work.
A machine raises a load of 750 N through a height of 16 m in 5 s. calculate:
- energy spent by machine,
- power at which the machine works.
A car is running at a speed of 15 km h-1 while another similar car is moving at a speed of 45 km h-1. Find the ratio of their kinetic energies.
Draw a neat labeled diagram to show the direction of two forces acting on a body to produce rotation in it. Also mark the point about which rotation takes place.
Explain the difference between a uniform linear motion and a uniform circular motion.
________ is said to be done when a force is acting on it.
