Magnetism Mock Tests

The SI unit of magnetic flux is:

A charged particle moves in uniform B field perpendicular to velocity. If kinetic energy is doubled (charge and B constant), the radius of circular path becomes:

A charged particle moves in a uniform magnetic field B in a circular path of radius R with speed v. If the speed is doubled and the magnetic field is halved, the new radius of the circular path is:

A long straight wire carries a current I. The magnetic field at a distance r from the wire is B. If the current is doubled and the distance is halved, the new magnetic field is

Two long straight parallel conductors A and B separated by distance d carry currents I and 2I in the same direction. The force per unit length on conductor A is F. If the current in A is doubled and the distance is increased to 3d, the new force per unit length on A is:

A charged particle moves in a circular path of radius R in a uniform magnetic field B perpendicular to its velocity. If the charge and mass of the particle are q and m respectively, the time period of revolution is

A charged particle moves in a uniform magnetic field perpendicular to its velocity. The kinetic energy of the particle:

A current I flows through an infinite wire bent at right angle (L-shape). The magnetic field at a point P located at perpendicular distance d from the corner, in the plane of the wire, is: