Advertisements
Advertisements
प्रश्न
MULTIPLE CHOICE TYPE
In an electric cell which in use, the change in energy is from:
विकल्प
Electrical to mechanical
Electrical to chemical
Chemical to mechanical
Chemical to electrical
Advertisements
उत्तर
Chemical to electrical
Hint: When current is drawn from an electric cell, the chemical energy stored in it changes into electrical energy.
संबंधित प्रश्न
An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?
Name a common device where a gear train is used
Work is said to be done by a forte only when ................
The S.I. unit of energy is .............
How much work is done when a force of 1 N moves a body through a distance of 1 m in its own direction?
Give two examples of work done.
Write an expression for the work done against gravity.
Complete the following sentences:
1 H.P. = ........ W.
A woman pulls a bucket of water of total mass 5 kg from a well which is 10 s. calculate the power used by her.
An electric motor pump is 60% efficient and is rated 2.5 H.P. Calculate the maximum load it can lift through a height of 10m in 8 sec. (1 H.P. = 750 W).
