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प्रश्न
Fill in the boxe to show the corresponding energy transformation.
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उत्तर
Electrical energy ⇌ Heat energy
संबंधित प्रश्न
Write an expression for the work done when a force is acting on an object in the direction of its displacement.
No work is done by a force if the body
A boy of weight 40 kgf climbs up the 15 steps, each 15 cm high in 10 s and a girl of weight 20 kgf does the same in 5 s. Compare:
- the work done, and
- the power developed by them. Take g = 10 N kg-1.
What do you mean by degradation of energy?
The work done on an object does not depend on the :
A 100 W electric lamp emits energy in the form of light at the rate 10 J per second. What percentage of electric energy does the lamp transform into light energy?
Give an example
Light energy changes to electrical energy.
In the following case write yes, if the work is being done and no if no work is being done.
A boy climbing up a staircase.
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).
