Magnetic Fielda

• magnets produce an electromagnetic force which is non-contact force
• The exchange particle of magnetic fields is a photon
• Magnetic fields only interact with any charged objects that are moving
• Moving charges will always have an electric and magnetic field, which work at right angles to each other.
• Magnetic field strength is directly proportional to the speed of a charge given by the equation: B = F/(v x Q)
• The correct name for magnetic field lines is magnetic flux measured in webers
• A Weber is defined as the change in flux of one Weber per second will induce an electromotive force of one volt in a closed loop of wire.
• The number of magnetic field lines is known as the magnetic flux density
• Magnetic flux shows the path A positive point charge will take in a field
• Magnetic field lines never cross each other