a bar magnet is placed uniform magnetic field.it experiences :
a steel wire of length L has a magnetic moment m.it is then bent into a semicircular arc. the new magnetic moment is:
the distance between two magnetic poles is doubled.if their polestrengths are also doubled then the force
betqween them;
a bar magnet has been cut equally lengthwise and breadthwise to give four equal parts.the polestrength
of each piece as compared to polestrenth of original bar magnet is:
which of the following statement is correct:
the field astrength of a bar magnet is