Electromagnetism I
Basic Concepts and Formulae
Motion of Charged Particles in Electric and Magnetic Fields
Assuming that the magnetic field (B) acts perpendicular to the plane of orbit of a particle of
charge q and mass m moving with velocity v, the radius of curvature (r) is given by
(1)
(2)
(3)
(4)
Null deflection: If the electric and magnetic fields are crossed, i.e. arranged at right angles
then the charged particle is undeflected. The condition is
v = E/B (5)
Magnetic Induction (B)
B at the Centre of a Coil of N Turns and of Radius r, Carrying Current i
(6)
The field into the page is indicated by a cross X and out of page by a dot.
B at Distance r from a Long Straight Wire
(7)
B at Distance r from a Straight Wire of Finite Length
(8)
Basic Concepts and Formulae
Motion of Charged Particles in Electric and Magnetic Fields
Assuming that the magnetic field (B) acts perpendicular to the plane of orbit of a particle of
charge q and mass m moving with velocity v, the radius of curvature (r) is given by
(1)
(2)
(3)
(4)
Null deflection: If the electric and magnetic fields are crossed, i.e. arranged at right angles
then the charged particle is undeflected. The condition is
v = E/B (5)
Magnetic Induction (B)
B at the Centre of a Coil of N Turns and of Radius r, Carrying Current i
(6)
The field into the page is indicated by a cross X and out of page by a dot.
B at Distance r from a Long Straight Wire
(7)
B at Distance r from a Straight Wire of Finite Length
(8)
