Soft iron pieces are placed across the ends of bar magnets when stored. What are such pieces called?
Preservatives
Keepers
Compasses
Poles
Bar magnets are stored in pairs with their unlike poles on the_____side separated by a piece of wood and two pieces of______should be placed at their ends.
Why solenoid are used to magnetise a piece of magnetic materials, like soft iron, when placed inside the coil?