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प्रश्न
Name the device or machine which convert :
Electrical energy into heat energy.
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उत्तर
An electric iron converts electrical energy into heat energy.
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संबंधित प्रश्न
A stone of mass 500 g is thrown vertically upwards with a velocity of 15 m/s. Calculate:
- the potential energy at the greatest height,
- the kinetic energy on reaching the ground, and
- the total energy at its half-way point.
State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his potential energy at the highest point? (g = 10 m/s2)
A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value of the stone?
Name the device or machine which convert :
Chemical energy into electrical energy.
Write the energy transformations which take place in an electric bulb (or electric lamp).
When an object falls freely towards the earth, then its total energy :
An object is falling freely from a height x. After it has fallen a height `pi/2` , it will possess :
The device which converts mechanical energy into energy which runs our microwave oven is :
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)
