The given figure shows an electromagnet
What will be the polarity at the end X
North
South
Positive
Negative
As the winding at end X is anticlockwise, the end X has north polarity.
Suggest ways by which the strength of the electromagnet may be increased.
The diagram in the figure shows a coil wound around a soft iron bar XY.
(a) State the polarity at the ends X and Y as the switch is pressed.
(b) Suggest one way of increasing the strength of electromagnet so formed.