Question

Question 9:
Why does the connecting cord of an electric heater not glow hot while the heating element does ?

Lakhmir Singh Physics Class 10

Answer 1

Answer:

The heating element of the heater is made up of alloy which has very high resistance. So, when current flows through the heating element, it becomes too hot and glows red due to heating effect of current. But the resistance of cord which is usually of copper or aluminium is very low so it does not glow.

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