Question

The correct plot of the magnitude of magnetic field $\vec{B}$ $vs$ distance $r$ from centre of the wire is, if the radius of wire is $R$

• A.
• B.
• C.
• D.

Answer 1

Answer: (B)

Answer 2

The magnetic field from the centre of wire of radius $R$ is given by $B=\left(\frac{\mu_{0}I}{2R^{2}}\right) r \left(r \,R\right)$ $\Rightarrow B \propto \frac{1}{r}$ From this descriptions, we can say that the graph $\left(b\right)$ is acorrect representation