Chapter 11

NCERT
Class 10
Science
Solutions
1. Why does the cord of an electric heater not glow while the heating element does?

Question:

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

Answer:

By Joule's law of heating, H ∝ R

Therefore, the resistance of the heating element is much higher than that of the heater cord. This gives more heat and makes this component better, whereas the cord of an electric heater does not.

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