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प्रश्न
Which is not the choice of heating element of an electric appliance?
पर्याय
It should have appreciable resistivity.
It should not get oxidised till 1000°C.
It should have a large thermal expansion.
It should have a high melting point.
MCQ
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उत्तर
It should have a large thermal expansion.
Explanation:
A heating element should have low thermal expansion. Large expansion can make it loosen when heated and cause problems with its insulation or housing.
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