The ratio of the magnetic field at the centre of a current carrying co – McqOptions

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1.	The ratio of the magnetic field at the centre of a current carrying coil of the radius a and at a distance ?a? from centre of the coil and perpendicular to the axis of coil is [MP PET 2002]
A.	\[\frac{1}{\sqrt{2}}\]
B.	\[\sqrt{2}\]
C.	\[\frac{1}{2\sqrt{2}}\]
D.	\[2\sqrt{2}\]
Answer» E.

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