Two long parallel wires carry currents i 1 a n d i 2 such that i 1 > i 2 . When the currents are in the same direction, the magnetic field at a point midway between the wires is 6 × 10 - 6 T . If the direction of i 2 is reversed, the field becomes 3 × 10 - 5 T . The ratio i 1 i 2 is

Step-by-step solution

When the currents are in the same direction then the magnetic field             B = μ 0 4 π × 2 d   i 1 - i 2         6 × 10 - 6 =   μ 0 4 π × 2 d   i 1 - i 2                       … ( i ) When the currents are in the reversed direction then the magnetic field