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प्रश्न
Name the device or machine which convert :
Mechanical energy into electrical energy.
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उत्तर
An electric generator converts mechanical energy into electrical energy.
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संबंधित प्रश्न
Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when
- The body is at the top.
- the body has fallen a distance x.
- the body has reached the ground.
State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________
Give two examples where a body possesses both, kinetic energy as well as potential energy.
What do you understand by the term 'transformation of energy"? Explain with an example.
Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
How much electric energy in kWh is consumed by an electrical appliance of 1000 watts when it is switched on for 60 minutes?
A ball falls to the ground as shown below :
What is the kinetic energy of ball when it hits the ground?
An object is falling freely from a height x. After it has fallen a height `pi/2` , it will possess :
How much energy does a 100 W electric bulb transfer in 1 minute?
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g = 10 m s–2)
