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Find the magnetic field at point O shown...

Find the magnetic field at point O shown in the figure

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`(mu_(0)i)/(4r) - (mu_(0)i)/(4pir)` inward
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  15. In case (a) and (b) where will the magnetic field be maximum, measured...

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  16. If for an Amperian loop oint vec(B).vec(dl) = 0 does that mean vec(B) ...

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