Two parallel long wires carry currents `i_(1)` and `i_(2)` with `i_(1) gt i_(2)` .When the current a
Channel: Doubtnut
Date: 2020-01-26

Two parallel long wires carry currents `i_(1)` and `i_(2)` with `i_(1) gt i_(2)` .When the current are in the same direction, the magnetic field at a point midway between the wire is `20muT`.If the direction of `i_(1)`,is reversed.the field becomes `30muT`.The ratio `i_(1)//i_(2)` is