Question

Consider a small vector area element $\Delta S$ of a closed surface $S$ as shown in figure. The magnetic flux through $\Delta S$ defined as $\Delta \phi_{B}$ is

• A. $B \cdot \Delta S$
• B. $2 B \cdot \Delta S$
• C. $B \cdot 2 \Delta S$
• D. $B \times \Delta S$

Answer 1

Answer: (A)

Consider a small vector area element $\Delta S$ of a closed surface $S$ as shown in figure. The magnetic flux through $\Delta S$ is defined as $\Delta \phi_{B}= B \cdot \Delta S$ where, $B$ is the field at $\Delta S$.