Two parallel, long wires carry currents I1 and I2 where I1 > I2. When – McqOptions

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1.	Two parallel, long wires carry currents I1 and I2 where I1 > I2. When the currents are in the same direction, the magnetic field at a point midway between the wires is 50 T. If the direction of I2 is revered, the field becomes 100 T. What is the value of ( frac {I_1}{I_2} )?
A.	1
B.	2
C.	3
D.	4
Answer» D. 4

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