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)