Questions
Two parallel, long wires carry currents i1 and i2 with i1 > i2 . When the current are in the same direction, the magnetic field at a point midway between the wire is 10 mT. If the direction of i2 is reversed, the field becomes 30 mT. The ratio i1/i2 is
detailed solution
Correct option is C
10 mT = μ02π r/2 i1 −i230 mT = μ02π r/2 i1 +i2Dividing : i1/i2 = 2Talk to our academic expert!
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Four long insulated current carrying wires, cross each other as shown in the figure. If the separation between any pair of parallel wires is d, the magnetic induction at O is
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