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magnetic circuit

n. (context physics English) A closed path of magnetic flux

Wikipedia
Magnetic circuit

A magnetic circuit is made up of one or more closed loop paths containing a magnetic flux. The flux is usually generated by permanent magnets or electromagnets and confined to the path by magnetic cores consisting of ferromagnetic materials like iron, although there may be air gaps or other materials in the path. Magnetic circuits are employed to efficiently channel magnetic fields in many devices such as electric motors, generators, transformers, relays, lifting electromagnets, SQUIDs, galvanometers, and magnetic recording heads.

The concept of a "magnetic circuit" exploits a one-to-one correspondence between the equations of the magnetic field in an unsaturated ferromagnetic material to that of an electrical circuit. Using this concept the magnetic fields of complex devices such as transformers can be quickly solved using the methods and techniques developed for electrical circuits.

Some examples of magnetic circuits are:

Usage examples of "magnetic circuit".

Any ion-drive craft going close to a planet is-a counter-magnetic circuit with a feedback loop -elementary.

If so, your mind energy was negative, funnelled in and pressing down on the brain as already described, causing dysfunction of the electro-magnetic circuit around your body and producing depression and fatigue.

He could not see the Space Ranger whirl into motion, pounce upon his boots, search their pockets with flying fingers, break the door's magnetic circuit, and slip out of the room seconds before the inevitable crowd of people with their confused cries of alarm had begun to gather.