Question

If the total magnetic field due to earth is $28 \,Am$, then the total magnetic induction due to earth is

• A. 28 T
• B. 280 ab-amp cm
• C. 0.352 gauss
• D. 0.352 T

Answer 1

Answer: (C)

Magnetic induction $B$ is given by
$B=\mu_{0} H $
$=4 \pi \times 10^{-7} \times 28 $
$=352 \times 10^{-7} T$
$(\because 1 \,T=10^{4} $ gauss $)$
$=0.352$ gauss