Question

The magnetic field intensity due to a bar magnet is 100 Am${}^{-1}$. The magnetic induction field strength due to it is :

• A. $\frac{4\pi }{{10}^7}T$
• B. $\frac{4\pi }{{10}^5}T$
• C. $\frac{{10}^3}{4\pi }T$
• D. $\frac{{10}^5}{4\pi }T$

Answer 1

Answer: (B)

$\frac{4\pi }{{10}^5}T$

Magnetic induction$={\mu }_0\times$Field intensity
$=4\pi \times {10}^{-7}\times 100$
$=\frac{4\pi }{{10}^5}$T