1/16/2024 0 Comments Calculate magnetic field of coilsHyperPhysics***** Electricity and Magnetism The expression is an idealization to an infinite length solenoid, but provides a good approximation to the field of a long solenoid. The magnetic field B is proportional to the current I in the coil. In the above expression for the magnetic field B, n = N/L is the number of turns per unit length, sometimes called the "turns density". The field canbe greatly strengthenedby the addition ofan iron core.Such cores aretypical in electromagnets. Such coils, called solenoids, have an enormousnumber of practical applications. Solenoids as Magnetic Field Sources SolenoidĪ long straight coil of wire can be used to generate a nearly uniform magnetic field similar to that of a bar magnet.
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