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Moving Charges and Magnetism — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMoving Charges and Magnetism1 Mark
Question
Current I flow through two parallel straight wires in the same direction/The wires are at a distance 2r from each other. What is the intensity of magnetic field atw the midpoint between the two wires?
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Answer

Total magnetic field B = 0 as magnetic fields produced by two wires are equal and mutually opposite.

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