Question

If the magnetic field has different magnitudes and directions at various parts of a surface as shown in given figure, then the magnetic flux through the surface is given by

• A. $\displaystyle\sum_{\text {all }} B_{i} \cdot d A_{i}$
• B. $\displaystyle\sum_{\text {all }} B_{i} \times\left(d A_{i}\right)^{2}$
• C. $\displaystyle\sum_{\text {all }} B _{i} \times d A _{i}$
• D. $\displaystyle\sum_{\text {all }} B _{i} \cdot d A _{i}$

Answer 1

Answer: (D)

$\sum_{\text {all }} B _{i} \cdot d A _{i}$