Question

why does the cord of electric oven glow while its heating element does?

Answer 1

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

Answer 2

The "heating element" of heater blocks the current and doesn't let it to pass. So, this healting element become heated and glows because of the heat.

Explanation:

• The cord of the electric oven is composed of aluminium or copper which has very low resistance.
• The "heating element" of the heater is formed of alloy having high resistance.
• Alloys are basically a mixture of two or more elements.
• Mixture of two or more metals or elements causes their "high melting and boiling points" and therefore, possess high resistance.
• Due to the high resistance, when the current flows through the heating elements, it becomes red and starts to glow.

To know more:

Why does the cord of an electric oven not glow while its heating element does

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