Question
A very long, straight wire carries a constant current. The magnetic field a distance $d$ from the wire and far from its ends varies with distance $d$ according toA. $d^{-3}$.B. $d^{-2}$.C. $d^{-1}$.D. $d$.E. $d^{2}$.
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We are interested in the magnetic field at a point P which is at a distance $d$ from the wire. Show more…
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Magnetic Effect of Current
Round 1
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