Question

State whether true or false :

The pattern of the magnetic field around a conductor due to electric current flowing through it depends on the shape of the conductor.

• A. True
• B. False

Answer 1

Answer: (A)

From Biot-Savart Law, the magnetic field created is given by

$d\overrightarrow{B}=\frac{{\mu }_0}{4\pi }\frac{(Id\overrightarrow{l}\times \overrightarrow{r^{\prime }})}{r^3}$

With changing shape of conductors conducting current, the value of $\overrightarrow{r}$ changes for different points on conductor.

Hence the pattern of magnetic field around conductor changes with changing shape.