Question

A wire in the form of a circular loop of one turn carrying a current forms a magnetic field B at the center. What will be new value of magnetic induction at the
center, if the same wire is looped into a coil of two turns carrying same current?
O 2B
O 3B
O4 B
Oі в​

Answer 1

Answer:

B' = 2B

Explanation:

B = Uo n I

I = B / Uo n.---------------- eq 1

I = B' / Uo 2n---------------- eq 2

compare 1 and 2

B /Uo n = B' / Uo 2n

B = B' / 2

B' = 2 B