Question

describe the energy change which take a place in a radio

Answer 1

in radio,wave energy is converted into sound energy with the help of third energy known as electricity.

Answer 2

A radio transforms electrical energy to the energy of sound.

Explanation:

• A radio transforms electrical energy to the energy of sound. In a radio set, electrical energy vibrates and creates sound through the speaker's diaphragm.
• Thus, the radio transforms electrical into kinetic energy and ultimately into sound.

• The transformation of energy can even be written as,

Electrical energy → Kinetic energy → Sound energy

Energy:- Energy conservation law notes that energy can be transformed into form, but not destroyed or created.

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Name the devices or machines which convert (i) Electrical energy into sound energy.

(ii) Heat energy into kinetic energy (or mechanical energy).

(iii) Chemical energy into kinetic energy (or mechanical energy).

(iv) Chemical energy into heat energy.

(v) light energy into heat energy.

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Name the electric device that converts mechanical energy into electrical energy. Draw the labelled diagram and explain the principle involved in this device.

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