Question

The magnetic induction at certain distance, in $\tan A$ position is $200Wb/m^2$. At the same distance in $\tan B$ method, the magnetic induction will be

• A. $400Wb/m^2$
• B. $200Wb/m^2$
• C. $100Wb/m^2$
• D. $50Wb/m^2$

Answer 1

The correct option is C $100Wb/m^2$

$B_A=B_{4}tan{\theta }_A$ (in $\tan A$) $[\because \frac{B_A}{B_B}=2]$

$\Rightarrow B_B=B_{4}tan{\theta }_B$ (in$tanB$)

$\Rightarrow \frac{B_A}{B_B}=\frac{200}{B_B}$

$\Rightarrow B_B=\frac{200}{2}$

$=100Wb/m^2.$