A circular coil of 200 mm diameter is made of 100 turns of thin wire and carries a current of 50 mA. Find the magnetic field induction at the centre of the coil.

A circular coil of 200 mm diameter is made of 100 turns of thin wire a

1.	A circular coil of 200 mm diameter is made of 100 turns of thin wire and carries a current of 50 mA. Find the magnetic field induction at the centre of the coil.
Answer» SOLUTION :Neglecting the thickness of the wire as compared with the radius of the COIL and the other dimensions, we obtain an EXPRESSION `B=(mu_(0)iwa^2)/(2(a^2+h)^(3//2))` where to is the number of turns, a is the radius of a burn, and h is the distance from the centre to the point on the axis of the coil where the field is to be DETERMINED.

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A circular coil of 200 mm diameter is made of 100 turns of thin wire and carries a current of 50 mA. Find the magnetic field induction at the centre of the coil.

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