Question

The magnetic field at point $P$ of given figure due to carrying of current I by a conductor of radius $R$, is

• A. $\frac{\mu_{0} I}{4 \pi r}$
• B. $\frac{\mu_{0} I}{2 \pi r}$
• C. $\frac{\mu_{0} I}{2 \pi R}$
• D. $\frac{\mu_{0} I}{4 \pi R}$

Answer 1

Answer: (B)

Magnetic field due to a current carrying conductor at an outside point is given by $B=\frac{\mu_{0} 1}{2 \pi r} T$