A conductor fo length 0.5 m is at `60^@` to the uniform magnetic field of induction `vecB` = 1 `webr//m^2`. Find the force experienced by the conductor if a current of 5 Ampere flows through it.

The area of a coil changes from A to (A+dA) in dt sec in a uniform magnetic field of induction vecB . If R is the resistance of the coil, the charge flowing through the coil is

A straight wire of mass 1 gram and length 20 cm is placed at right angles to a unifrm magnetic field. Find the minimum value of magnetic field which can support the wire against its weight when a current of 2A flows through the wire.

A current carrying conductor of length 1 m is placed in a uniform magnetic field of 5 xx 10^-4 Wb/ m^2 at an angle of 60^@ with the field. If the magnetic force on the conductor is 3 xx 10^-3 N , calculate the current in the conductor.

Two infinitely long straight conductors carrying of 5A and 3A are 20 cm apart. Find the magneitc field induction at a point midway between the conductors if the current flows through the conductors in the (a) same direction, (B) opposite direction