The figure shows the current flowing in the coil of wire wound around the soft iron horseshoe core. State the polarities developed at the ends A and B.
End A - South pole
End B - North pole
An insulated copper wire is wound on a soft iron core. Current is passed through the coil such that at end ‘A’ the current flows anti- clockwise and a magnetic compass needle placed at other end ‘B’ of the coil.
i) What polarity is created at B?
ii) How is the magnetic compass affected when current flows through the coil?
The diagram shows a coil wound around a soft iron bar XY. The polarity at the ends X and Y are