Question

State whether true or false :

An electric current is a stream of moving charges which create a magnetic field whose direction is at right angles to the direction of the current

• A. True
• B. False

Answer 1

The correct option is A True

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

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

Clearly the direction of magnetic field is perpendicular to the direction of current flowing.