cord of electric heater

Asked by  | 13th Sep, 2008, 11:48: AM

Expert Answer:

The cord is generally made of copper  and the heating element of nichrome. Copper is a good conductor whose resistivity is low. Nichrome on the other hand has much higher resistivity. So when the same current flows through them I2Rt which is the energy dissipated - is more in nichrome than in copper. So nichrome becomes hotter and hence glows

Answered by  | 14th Sep, 2008, 12:45: PM

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