A closed circular coils of average radius `10 xx 10^-2` m is placed normal in a uniform magnetic field of intensity `100 xx 10^-4` T. Determine the amount of charge flowing through the coil if it is turned through `180^@` about one of its diameters, giveii that the resistance of the coil is `2 Omega`.

The current flowing through a wire depends on time as l=9t^2+4t+1 . What will be the amount of charge flowing through the cross section of wire in time t=1s to t=2s?

A magnetised needle of magnetic moment 4.8xx10^(-2)JT^(-1) is placed at 30^@ with the direction of uniform magnetic field of magnitude 3xx10^(-2)T . Calculate the torque acting on the needle.

Through a straight conduction wire of length 1 m 2, A current is flowing. If the wire is placed normal to a uniform magnetic field of strength 10^(-3)T , what will be the magnetic force acting on the wire

The radius of a circular coil having 100 turns is 5 cm and a current of 0.5A is flowing through this coil. If it is placed in a uniform magnetic field of stregth 0.001 T, then what torque will act on the coil, when the plane of the coil is perpendicular to the magnetic field ?

The radius of a circular coil having 100 turns is 5 cm and a current of 0.5A is flowing through this coil. If it is placed in a uniform magnetic field of stregth 0.001 T, then what torque will act on the coil, when the plane of the coil is parallel to the magnetic field,

A coil with an average diameter of 0.04 m is placed perpendicular to a magnetic field of 4000T. If induced emf is 22V when the magnetic field is changed to 2000T in 2s. What is the number of turns in the coil?

A circular coil of 30 turns and radius 8.0 cm carrying current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60^@ with the normal to the coil. Calculate the magnitude of the counter torque, that must be applied to prevent the coil from turning.