A battery is connected between two points A and B in the circumference of a uniform conducting ring. AB of the ring subtends an angle at the centre. The value of the magnetic induction at the centre due to the current in the ring is:
Zero, only if
Zero, for all values of
Proportional to 2(180 - )
Inversely proportional to r
The field due to the arc at the centres is given by:
(arc length)
i.e., the field at the centre of the coil is zero and is independent of .
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