Two identical wires A and B, each of length "l", carry the same current I. Wire A is bent into a circle of radius R and wire B is bent to form a square of side ′a′. If BA and BB are the values of magnetic field at the centres of the circle and square respectively, then the ratio BA/BB is - VgyanHub

Question:

Two identical wires A and B, each of length “l”, carry the same current I. Wire A is bent into a circle of radius R and wire B is bent to form a square of side ′a′. If BA and BB are the values of magnetic field at the centres of the circle and square respectively, then the ratio BA/BB is

Options :

(a) π2/16√2
(b) π2/16
(c) π2/8√2
(d) π2/8

Answer :

(c) π2/8√2

Answer Steps :

step 1:

step 2:

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