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Find the Odd One Out: (i) Voltmeter, Ammeter, Galvanometer, Thermometer. (ii) Loudspeaker, Bar Magnet, Electric Motor, Microphone. - Science and Technology 1

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Find the odd one out:

(i) Voltmeter, ammeter, galvanometer, thermometer.
(ii) Loudspeaker, bar magnet, electric motor, microphone.

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Solution

(i) thermometer
A thermometer is a device used for measuring temperature. The other devices are used to measure current and potential difference in a circuit.


(ii) bar magnet
In the other devices, one form of energy is converted to another form of energy.

Concept: Electric Current
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