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Q.20. Derive expression for the magnetic induction at the centre of a coil carrying current.

Answer»

Magnetic FieldPatterndue toaCircular Loop Carrying Current. Themagnetic fieldlines are concentric circles at every point of acurrent carrying circular loop. ... The direction ofmagnetic field at the centreofcircular coilis perpendicular to the place of thecoil. i.e. along the axis of thecoil.

B= idlsin theeta/r^2 by combination of all these



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