Question

In a wire of length $4m$ and diameter $6mm$, a current of $120$ ampere is passed. The potential difference across the wire is found to be 18 volt. The resistance of wire will be

• A. 0.l5 $\Omega$
• B. 0.25 $\Omega$
• C. 6.660 $\Omega$
• D. None of the above

Answer 1

The correct option is A 0.l5 $\Omega$

By definition,
R $=\frac{V}{I}=\frac{18}{120}=0.15\Omega$