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Question

The correct relation between heat produced (H) and electric current (I) flowing through a given material is:

A

H directly proportional to I

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B

H directly proportional to (1/I)

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C

H directly proportional to I²

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D

H directly proportional to (1/I²).

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Solution

The correct option is C
H directly proportional to I²

We know, H = VIt

Applying Ohm’s Law, H = $I^{2}$ Rt. From this equation, we can conclude that the heat produced is directly proportional to the electric current flowing through a given material.

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