Advertisements
Advertisements
प्रश्न
Give an example
Chemical energy changes to electrical energy.
Advertisements
उत्तर
Dry cell
APPEARS IN
संबंधित प्रश्न
When do we say that work is done?
Define 1 joule of work.
Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.
Name the physical quantity whose SI unit is Nm.
What is the relationship between Nm and dyne cm?
Name the physical quantity whose MKS units are kgm2s-3.
An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate
(i) the amount of work done, (ii) the power of the machine.
Can two agents, doing the same work, have different power?
What is the difference between renewable and non-renewable resources?
A block of mass 30 kg is pulled up a slope, as shown in diagram with a constant speed, by applying a force of 200 N parallel to slope.
A and B are initial and final positions of block.
(i) Calculate the work done by force in moving the block from A to B.
(ii) Calculate P.E. gained by block. [g=10ms-2]
