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

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Why does the connecting cord of an electric heater not glow hot while the heating element does ?
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The connecting cord of the heater made of copper does not glow because negligible heat is produced in it by passing current (because of its extremely low resistance); but the heating element made of nichrome glows because it becomes red-hot due to the large amount of heat produced on passing current (because of its high resistance). 

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