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Magnetic Field Due to a Straight Long Wire

An equilatera...

Question

An equilateral triangle of side a is formed from a piece of uniform resistance wire. The current enters in one corner and leaves out of the other as shown in Figure. What is the flux density of magnetic field at the centre O?

A

\frac{\sqrt{3} μ_{0} i}{4 π a}

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B

\frac{μ_{o} i}{2 π a}

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C

Zero

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D

\frac{3 μ_{o} i}{2 π a}

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Solution

The correct option is C Zero

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