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  4. A current of 2 A, passing through a conductor produces 80 J of heat in 10 seconds. The resistance of the conductor in ohm is

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Q. A current of $2 \,A$, passing through a conductor produces $80\, J$ of heat in $10$ seconds. The resistance of the conductor in ohm is

AIPMTAIPMT 1989Current Electricity

Solution:

$H=I^2Rt$ or $R =\frac{H}{(I^2 t)}=\frac{80}{(2^2 \times 10)} = 2\, \Omega$