Question

The magnetic field due to earth has a vertical component of $30\mu T$ at a place where dip angle is $30°$. Find magnetic field at the point.

• A. $15\mu T$
• B. $10\mu T$
• C. $60\mu T$
• D. $5\mu T$

Answer 1

The correct option is C $60\mu T$

$sin30°=\frac{V}{B}\Rightarrow \frac{1}{2}=\frac{30}{B}\Rightarrow B=60\mu T$