A) zero
B) \[\frac{{{\mu }_{0}}i}{4\pi R}\]
C) \[\frac{{{\mu }_{0}}i}{2\pi R}\]
D) \[\frac{{{\mu }_{0}}i}{\pi R}\]
Correct Answer: B
Solution :
Magnetic field at mid point due to wire AB \[{{B}_{1}}=\frac{{{\mu }_{0}}i}{2\pi R}\] Magnetic field at midpoint due to wire CD \[{{B}_{2}}=\frac{{{\mu }_{0}}i}{2\pi R}\] Resultant of Magnetic field\[B={{B}_{1}}+{{B}_{2}}\] \[=\frac{{{\mu }_{0}}i}{2\pi R}+\frac{{{\mu }_{0}}i}{2\pi R}\] \[B=\frac{{{\mu }_{0}}i}{\pi R}\]You need to login to perform this action.
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