Question

why does the cord of an electric heater not glow while the heating heater not glow while the healing element does

Answer 1

The cord of an electric heater has less resistance than that of the coil as the coil is made up of alloy which offers a very high resistance to the electricity for which it glows. For this reason the cord of an electric heater doesn't glow.
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Answer 2

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• The heating element of an electric heater ¡s a resistor. The amount of heat produced by it is proportional to its resistance. The resistance of the element of an electric heater is very high. As current
• flows through the heating element, it becomes too hot and glows red. On the other hand, the resistance of the cord is low. It does not become red when current flows through it