A wire in the form of a circular loop of one turn, carrying a current, produces a magnetic field B at the centre. If the same wire is looped into a coil of two turns and carries the same current, the new value of magnetic induction at the centre is

Options

(a) 5 B
(b) 3 B
(c) 2 B
(d) 4 B

Correct Answer:

4 B

Explanation:

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