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
Superconducting magnetic energy storage mean radius of coil is "R". "a" and "b" are width and depth of the conductor. "f" is called form function which is different for different shapes of coil. "ξ" (xi) and "δ" (delta) are two parameters to characterize the dimensions of the coil. We can therefore write the magnetic energy stored in such a cylindrical coil as shown below. This energy is a function of coil dimensions, number of turns and carrying current. Where Besides the properties of the wire, the configuration of the coil itself is an important issue from a mechanical engineering aspect. There are three factors