If the contour is oriented along the lines of magnetic induction, then the normal to the contour will be directed perpendicular to the lines of induction. The magnetic flux Ф is found by the formula:
Ф = B * Sк * cos a, where B is the absolute value of the induction vector, Sк is the area of the contour, a is the angle between the normal to the contour and the induction vector.
In our case, a = 90 ° and the factor cos a = cos 90 ° = 0, and therefore the product B * Sк * cos a is equal to zero.
Answer: Flow Ф = 0.
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