Questions
Two long parallel wires P and Q are held perpendicular to the plane of paper with distance of 5 m between them. If P and Q carry current of 2.5 amp and 5 amp respectively in the same direction, then the magnetic field at a point half-way between the wires is
detailed solution
Correct option is C
B=μ04π×2i2(r/2)−μ04π×2i1(r/2)=μ04π×4i2−i1r=μ0π×(5−2⋅5)5=μ02πTalk 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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