A constant voltage is applied on a uniform wire, then the h…

Physics Heating and Chemical Effect of Current Heating Effect of Current MCQ (Single Correct)

A constant voltage is applied on a uniform wire, then the heat is produced. The heat so produced will be doubled, if

The length and the radius of wire are halved

Both length and radius are doubled

Only the length is doubled

Only the radius is doubled

Text Solution

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The correct answer is:

Heat developed is

Heat developed will be doubled when is halved. Further, and . So heat produced when both the length and radius of the wire are doubled.

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