Question

If the total magnetic field due to earth is $28Am$, 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
$B={\mu }_{0}H$
$=4\pi \times 10^{-7}\times 28$
$=352\times 10^{-7}T$
$(\because 1T=10^4$ gauss $)$
$=0.352$ gauss