Q. The magnetic induction due to an infinitely long straight wire carrying a current $i$ at a distance $r$ from wire is given by
A) $\left| \mathbf{B} \right| = \left( \frac{\mu_{0}}{4\pi} \right)\frac{2i}{r}$
B) $\left| \mathbf{B} \right| = \left( \frac{\mu_{0}}{4\pi} \right)\frac{r}{2i}$
C) $\left| \mathbf{B} \right| = \left( \frac{4\pi}{\mu_{0}} \right)\frac{2i}{r}$
D) $\left| \mathbf{B} \right| = \left( \frac{4\pi}{\mu_{0}} \right)\frac{r}{2i}$
Explanation
The correct answer is Option A: $\left| \mathbf{B} \right| = \left( \frac{\mu_{0}}{4\pi} \right)\frac{2i}{r}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.