A square loop `PQRS` of side `'a'` and resistance `'r'` is placed near an infinitely long wire carrying a constant current `I`. The sides `PQ` and `RS` are parallel to the wire. The wire and the loop are in the same plane. The loop is rotated by `180^(@)` about an axis parallel to the long wire and passing through the mid points of the side `QR` and `PS`. The total amont of charge which passes through any point of the loop during rotation is:

Options

A. `(mu_(0)Ia)/(2 pi r) l n2`
B. `(mu_(0)Ia)/(pi r) l n2`
C. `(mu_(0)Ia^(2))/(2pir)`
D. `(mu_(0)ia)/(2pir)`

Answer

B