Q39 of 54 Page 135

When we light a bulb by pressing the switch, then explain the energy transformation which takes place.

The battery stores chemical energy, when the switch is closed this chemical energy transforms into electrical energy and flows through the wire which is then converted into light energy as the bulb glows.


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How can we reduce the dissipation of energy?

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What is electrical power? How the electricity consumed in our houses is calculated? Explain with example.

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What is energy? Prove that the work done by any object is equal to the difference of two energies present in the object.

 41

What is electrical energy? How electrical energy is generated in the following power plant? Explain

(a) Hydro electric power plant (b) Wind energy power plant (c) Solar energy power plant.