Question
Explain what you understand by magnetic flux.
✓
Answer
The total number of magnetic lines of force passing normally through a given area in a magnetic field, is called the magnetic flux through that area.
Consider a very small area dA in a uniform magnetic field of induction $\vec{B}$. The area dA can be represented by a vector $\overrightarrow{d A}$ perpendicular to it.
[Note : The area vector is perpendicular to the sur-face, so it can point either up and to the right as shown or down and to the left. Although either choice is acceptable, choosing the direction that is closest to the magnetic field is convenient and usually the one we choose.]
Consider a very small area dA in a uniform magnetic field of induction $\vec{B}$. The area dA can be represented by a vector $\overrightarrow{d A}$ perpendicular to it.
[Note : The area vector is perpendicular to the sur-face, so it can point either up and to the right as shown or down and to the left. Although either choice is acceptable, choosing the direction that is closest to the magnetic field is convenient and usually the one we choose.]
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