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Two parallel long wires carry currents i...

Two parallel long wires carry currents `i_(1) "and" i_(2)` with `i_(1) gt i_(2)`.When the currents are in the same direction then the magnetic field midway between the wires is `10 mu T.` when the direction of `i_(2)` is reversed ,then it becomes `40 mu T.` then ratio of `i_(1)//i_(2)` is

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Two parallel long wire carry currents i_(1) and i_(2) with i_(1) gt i_(2) . When the currents are in the same direction , the magnetic field midway between the wires is 10 muT . When the direction of i_(2) is reversed, it becomes 40 muT . The ratio i_(1)//i_(2) is

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Two parallel, long wires carry currents i_1 and i_2 with i_1gti_2 . When the currents are in the same direction, the magnetic field at a point midway between the wires is 10mu T. If the direction of i_2 is reversed, the field becomes 30mu T . The ration i_1/i_2 is