Question

A current of 2 A passing through conductor
produces 80 J of heat in 10 seconds. The resistance
of the conductor is
​

Answer 1

Given :

▪ Current passing through through conductor = 2A

▪ Amount of heat energy = 80J

▪ Time interval = 10s

To Find :

▪ Resistance of the conductor.

Formula :

✏ Formula of heat produced by electric current is given by

$\bigstar\underline{\boxed{\bf{\green{H=I^2Rt}}}}$

• H denotes heat
• I denotes current
• R denotes resistance
• t denotes time

Calculation :

$\Rightarrow\sf\:H=I^2Rt\\ \\ \Rightarrow\sf\:80=(2)^2\times R \times 10\\ \\ \Rightarrow\sf\:80=40R\\ \\ \Rightarrow\sf\:R=\dfrac{80}{40}\\ \\ \Rightarrow\underline{\boxed{\bf{\red{R=2\Omega}}}}$

Answer 2

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