When the S–pole of a magnet is placed near an unknown pole of another magnet, the two magnets
When an iron bar is moved over a bar magnet along its length the attractive force
Earth’s magnetic field always has a horizontal component except at
The distance between two magnetic poles is doubled and their pole-strength is also doubled. The force between them
Which of the following is an artificial magnet?
A conducting wire can give magnetic poles when it
The force which makes maglev move
The magnetic force will pull the vehicle.
To shield an instrument from external magnetic field, it is placed inside a cabin made from
The cabin is made up of iron because maximum magnetic lines of forces pass through it.
Electromagnets are made of softiron because soft iron has
Soft iron has high retentivity and low coercive force.
Curie temperature is the temperature above which