Question

Magnetic field due to current carrying conductor depends on :

• A. Current flowing through conductor
• B. Distance from the conductor
• C. Length of the conductor
• D. (A) and (B)

Answer 1

The correct option is D (A) and (B)

From Biot-Savart law, magnetic field at a point p, $\overrightarrow{B}=\frac{{\mu }_o}{4\pi }\int \frac{I\overrightarrow{dl}\times \overrightarrow{r}}{r^3}$

where $r$ is the distance of point p from conductor and $I$ is the current in the conductor.

Thus magnetic field due to current carrying conductor depends on the current flowing through conductor and distance from the conductor.