ECE 201 Circuit Theory I1 Magnetic Field Permanent magnet –Electrons spinning about their own axis in a particular alignment Charges in motion –Electric current Represent by closed loops –Flux lines Magnetic polarity –North, South

ECE 201 Circuit Theory I2 Right-Hand Rule Grasp conductor with right hand, thumb pointing in the direction of conventional current flow Fingers curl in the direction of magnetic field (lines of flux)

ECE 201 Circuit Theory I3 Through a Coil of Wire Grasp the coil with the right hand, fingers curled in the direction of current Thumb points in the direction of the magnetic field

ECE 201 Circuit Theory I4 For a Permanent Magnet Magnetic field direction is OUT from the NORTH pole and IN to the SOUTH Pole