Question

In the given figure, the magnetic field at ‘$O$’.

• A. $\frac {3}{4} \frac {\mu_oI}{r}+\frac {\mu_oI}{4\pi r}$
• B. $\frac {3}{10} \frac {\mu_oI}{r} - \frac {\mu_oI}{4\pi r}$
• C. $\frac {3}{8} \frac {\mu_oI}{r} + \frac {\mu_oI}{4\pi r}$
• D. $\frac {3}{8} \frac {\mu_oI}{r} - \frac {\mu_oI}{4\pi r}$

Answer 1

Answer: (C)

$B_{\text {net }}=B_{1}+B_{2}+B_{3}$
$=\frac{3}{8} \frac{\mu_{0} I}{r}+\frac{\mu_{0} I}{4 \pi r}+0$