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A current $\dpi{100} I$ flows in an infinitely long wire with cross-section in the form of a semicircular ring of radius $\dpi{100} R$ The magnitude of the magnetic induction along its axis is

• Option 1)

$\frac{\mu _{0}I}{\pi ^{2}R}$

• Option 2)

$\frac{\mu _{0}I}{2\pi ^{2}R}$

• Option 3)

$\frac{\mu _{0}I}{2\pi R}$

• Option 4)

$\frac{\mu _{0}I}{4\pi R}$

As we learnt in  For Finite Length - - wherein    Current in a small element dI Magnetic field due to the element Option 1) Correct Option 2) Incorrect Option 3) Incorrect Option 4) Incorrect
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