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Derive an expression for Joule's law of heating. (ii) Give two examples for applications of heating effect of electric current.

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Derive an expression for Joule's law of heating.

(ii) Give two examples for applications of heating effect of electric current.

(iii) 100 J of heat is produced each second in a 4 Ω resistor.

Find the potential difference across the resistor.

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Now, V = IR

V=5x4

V =20V

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