18 The magnetic field due to current carrying loop of radius 3cm at a point on the axis at a distance of 4 cm from the centre is

Question

18 The magnetic field due to current carrying loop of radius 3cm at a point on the axis at a distance of 4 cm from the centre is 54u T Its value at the centre of the loop is O 125 T O 150 T 75 T O 250 T 2

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