EASY
12th CBSE
IMPORTANT
Earn 100
A bar magnet of magnetic moment is aligned parallel to the direction of a uniform magnetic field . What is the work done, to tum the magnet, so as to align its magnetic moment: normal to the field direction?
Important Questions on Magnetism
EASY
12th CBSE
IMPORTANT
A bar magnet is placed in a uniform magnetic field with its magnetic moment making an angle with the field. Write an expression for the torque acting on the magnet and hence define its magnetic moment.
EASY
12th CBSE
IMPORTANT
A bar magnet is placed in a uniform magnetic field with its magnetic moment making an angle with the field. Write an expression for the potential energy of the magnet in this orientation. When is this energy minimum?
EASY
12th CBSE
IMPORTANT
Using the relation for potential energy of a current carrying planar loop, in a uniform magnetic field, obtain the expression for the work done in moving the planar loop from its unstable (equilibrium) position.
EASY
12th CBSE
IMPORTANT
A coil of turns 'and radius carries a current . It is unwound and rewound to make another coil of radius , current remaining the same. Calculate the ratio of the magnetic moments of the new coil and the original coil.
EASY
12th CBSE
IMPORTANT
A compass needle, pivoted about the horizontal axis and forced to move in the magnetic meridian, is observed to point along the vertical direction at a place . Give the value of angle of dip at these two places.
EASY
12th CBSE
IMPORTANT
A compass needle, pivoted about the horizontal axis and forced to move in the magnetic meridian, is observed to point along the horizontal direction at a place . Give the value of angle of dip at these two places.
EASY
12th CBSE
IMPORTANT
If a compass box and a dip circle were taken to the magnetic north pole of the earth, what would one observe with regard to the direction of their respective needle and why?
EASY
12th CBSE
IMPORTANT
How will you decide whether the magnetic field at a point is due to some current-carrying conductor or due to earth?
