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Magnetic Field Due to a Straight Long Wire

What is the n...

Question

What is the net magnetic field at point O?

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Solution

Magnetic field due to infinite straight wire $B_{1} = \frac{μ_{o} I}{2 π R}$
Magnetic field due to circular wire $B_{2} = \frac{μ_{o} I}{2 R}$
Net magnetic field $B_{n e t} = B_{1} + B_{2} = \frac{μ_{o} I}{2 R} (1 + \frac{1}{π})$

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