The current carrying wire has a magnetic field around it and the lines of force are in the form of concentric circles with their centers on the wire.

A moving charge experiences a force in a magnetic field called magnetic Lorentz force given by.This force acts only if the particle (i) has charge q(ii) has a non zero velocity v and (iii) does not move parallel or anti parallel to the magnetic field B. A current carrying conductor placed in a magnetic field experiences a force given by

The electrostatic force experienced by a positive charge q placed in an electric field is . The force acts in the direction of the electric field.The magnetic force acting on a charge of magnitude q moving with a velocity 'v' is .This acts in a direction perpendicular to the plane containing the vectors. and

The force experienced by a charged particle in a magnetic field is given by .The right hand rule for vector product can be used to determine the direction of .

A moving charge experiences a force in a magnetic field called magnetic Lorentz force given by

The SI unit of magnetic field is Tesla (T)

force experienced by a conductor of length l carrying current I placed in magnetic field B is given by .Here =

magnetic field at a point located at a distance x from the center of the coil of radius R carrying current along its axis is

The charged particle experiences magnetic Lorentz force given by.This force acts in the plane of the paper perpendicular to the velocity vector at all points on the plane. Magnetic Lorentz force acts like a centripetal force, causing the particle to move in a circle.

Cyclotron is a particle accelerator, which uses electric field to accelerate the charged particle and magnetic field to make it move in a circular path. During acceleration in the electric field, the particle acquires high energies of the order of a few million electron volts.