Question
Question: Five long wire A, B, C, D and E each carrying current I are arranged to form edges of a pentagonal p...
Five long wire A, B, C, D and E each carrying current I are arranged to form edges of a pentagonal prism as shown in figure. Each wire carries current out of the plane of paper, the magnetic induction at a point on the axis O is (Axis O is a distance R from each wire) is
A
Equal to zero
B
Less than zero
C
More than zero
D
Infinite
Answer
Equal to zero
Explanation
Solution
The resultant magnetic field induction at O due to current through all the five wires will be zero.