Question

The magnetic field intensity due to a magnet is $\frac{100}{4\pi }$A/m. The induction field strength due to it is :

• A. $1\times {10}^{-5}T$
• B. $\frac{4\pi }{{10}^3}T$
• C. $\frac{{10}^3}{4\pi }\times 100T$
• D. $\frac{{10}^{-5}}{4\pi }T$

Answer 1

Answer: (A)

$1\times {10}^{-5}T$

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