The diagram below shows two concentric, conducting, circular loops with currents traveling in opposite directions. If the current in the outer loop is I2 = 90.0 ̄μA, what must be the magnitude of the current in the inner loop so that the total magnetic field at the center, C, of both loops is zero?
I2 = 90.0 μA, r1 = 8.00 cm, r2 = 12.0 cm