Magnetic field

5.4 Lorentz force:

1.  Direction and magnitude  of the magnetic force       F = q * ( v x B ) 

2. Motion in uniform magnetic field          m * v = q * B * r

3.  Magnetic work        Velocity selector        v =  E  / B              Mass spectrometer

4. Cyclotron                       

5.5 Magnetic force on a wire:

1. Magnitude of the magnetic force on a straight current carrying wire  in uniform magnetic field       F = (I*L ) x (B )        Right hand rule       Definition of Tesla unit 

2. Magnetic force between straight wires

3. Right hand rule for current and magnetic moment of a loop          Magnetic force on a  loop in a uniform magnetic field             DC motor with commutator and brushes

4. *Hall effect - edex  

5.6 Sources of the magnetic fields and visualization by field lines:

1. Magnetic field of a horseshoe magnet              Field lines start at north and end at south pole

2. Grip rule for the magnetic field of straight current carrying wire          Circular field       

3. RHR for the current and magnetic field of a loop           RHR for magnetic dipole      Dipole field           Bar magnet          

4. Magnetic field of solenoid          Grip rule for current and magnetic field            B = (mu) * n * I

 .1 Magnetism: 

1. Classical magnetism is generated by current carrying loop ( Biot-Savart law )

2. Atomic magnetism originating  from the net magnetic moment of an atom

   • Diamagnetism ( creation of induced dipoles by external magnetic field )

   • Paramagnetism (alignment of permanent dipoles in the presence of  external magnetic field) 

   • Ferromagnetism(self alignment of permanent dipoles)     Hard magnet(in a electrical generator)    Soft magnet(in a transformer)