Question : Conversion of heat into electrical energy is achieved by using:
Option 1: ammeter
Option 2: hydrometer
Option 3: voltmeter
Option 4: thermocouple
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Correct Answer: thermocouple
Solution : The correct answer is a thermocouple.
A thermocouple is a temperature-measuring device comprised of two conductors that are not identical to one another and come into contact at one or more locations where there is a temperature difference experienced by the various conductors (or semiconductors).
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