Magnetic field by that loop. Ampère's law is always valid for steady currents and can be used to calculate the -field for certain highly symmetric situations such as an infinite wire or an infinite solenoid. In a modified form that accounts for time varying electric fields, Ampère's law is one of four Maxwell's equations that describe electricity and magnetism. A charged particle moving in a -field experiences a "sideways" force that is proportional to the strength of the magnetic field, the component of the velocity that is perpendicular to the magnetic field and the charge of the particle. This force is known
Inductive discharge ignition in the wire. This voltage jumps across the gap of either the ignitor or a spark plug located in the combustion chamber and ignites the air-fuel mixture to do work. Some magnetos have a second coil of wire located next to the first, called a secondary coil. This coil is usually much longer than the primary loop, accomplished by many more loops around the magnetic core. As the magnetic field is built, it induces a current in the secondary coil as well. When the contact breaker opens the circuit, the magnetic field collapses, causing a high electric voltage in the