A current of 10A is passing through a long wire which has semicircular – McqOptions

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1.	A current of 10A is passing through a long wire which has semicircular loop of the radius 20cm as shown in the figure. Magnetic field produced at the centre of the loop is [Orissa JEE 2003]
A.	\[10\,\pi \mu T\]
B.	\[5\,\pi \mu T\]
C.	\[4\,\pi \mu T\]
D.	\[2\,\pi \mu T\]
Answer» C. \[4\,\pi \mu T\]

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