Question

A current of 2a passes through a conductor and produces 80 j of heat in 10 sec. The resistance of conductor

Answer 1

i=2A,H=80j,t=10s
So,. H=i×i×r×t
80 =2×2×r×10
r=80/40=2 ohm

Answer 2

Given :

Current , I = 2 A .

Heat produces , H = 80 J .

Time taken , t = 10 sec .

To Find :

The resistance of conductor .

Solution :

We know , heat produced is given by :

$H=I^2Rt\\\\R=\dfrac{H}{I^2t}$

Putting all given values , we get :

$R=\dfrac{80}{2^2\times 10}\\\\R=2\ \Omega$

Therefore , the resistance of conductor is 2 ohms .

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Current Electricity

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