B = O
Inside the cylinder when current is uniformly distributed throughout the crosssection of the cylinder ( r < R )
B = μ o μ r / 2 π Ir / R 2
where , μ o and μ r are permeabilities of free space and material of the cylinder , I is current flowing through the cylinder and r is radius of the cylinder .
Force Acting on a Charge Particle Moving in a Uniform Magnetic Field F = q ( v * B ) or F = | F | = Bqv sin θ where , B = magnetic field intensity , q = charge on particle , u = speed of the particle and θ = angle between magnetic field and direction of motion . This force is perpendicular to B as well as v . Its direction can be obtained from Fleming ’ s left hand rule .
Magnetic force acting on a current carrying conductor in a uniform magnetic field is given by
F = I ( I * B )