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प्रश्न
State the energy transformation on the following:
Electricity is obtained from solar energy.
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उत्तर
Light energy into electrical energy
संबंधित प्रश्न
State two factors on which the work done on a body depends.
A weight lifter lifted a load of 200 kgf to a height of 2.5 m in 5 s. Calculate:
- the work done, and
- the power developed by him. Take g = 10 N kg-1
A boy weighing 25 kgf climbs up from the first floor at height 3 m above the ground to the third floor at height 9m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg -1)
How much work is done when a force of 1 N moves a body through a distance of 1 m in its own direction?
Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
In which of the following case the work done by a force will be maximum : when the angle between the direction of force and direction of motion is 0° or 90°?
What is the relationship between Nm and dyne cm?
State the energy changes which take place when Water stored in the dam is used to turn turbine in dynamo.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Suma is swimming in a pond.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A wind-mill is lifting water from a well.
