A) \[B=\frac{1}{4\pi }\frac{2I}{r}\]
B) \[B=\frac{{{\mu }_{0}}}{4\pi }\left( \frac{2I}{r} \right)\]
C) \[B=\frac{{{\mu }_{0}}}{4\pi }\left( \frac{I}{r} \right)\]
D) zero
Correct Answer: B
Solution :
The magnetic field at P would be given by \[{{B}_{net}}={{B}_{BP}}-{{B}_{BP}}=\frac{{{\mu }_{0}}I}{4\pi r}-\left( -\frac{{{\mu }_{0}}I}{4\pi r} \right)\] \[=2\left( \frac{{{\mu }_{0}}}{4\pi }\frac{I}{r} \right)=\frac{{{\mu }_{0}}}{4\pi }\frac{2I}{r}\]You need to login to perform this action.
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