Magnetic field intensity at centre of circular coil, of diameter 2 m and carrying a current of 4 A is

Given that, diameter = 2 m

Radius (R) = 1 m

Current (I) = 4 A

Magnetic field intensity at centre of a circular coil is given by

$(H = \frac{I}{{2R}} = \frac{4}{{2 \times 1}} = 2\;A/m)$

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