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The heat developed in an electric wire o...

The heat developed in an electric wire of resistance R by a current I for a time t is

A

`((I^2 Rt)/(4.2 ))Cal`

B

`((I^2 t)/(4.2 R )) cal`

C

`((I^2 R )/(4.2 t )) Cal `

D

`((Rt )/( 4.2 I^2 ))cal`

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The correct Answer is:
A
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