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For magnetic circuits, the relationship which is similar to application of Ohm’s Law is, (where ϕ is flux, S is reluctance)

For magnetic circuits, the relationship which is similar to application of Ohm’s Law is, (where ϕ is flux, S is reluctance) Correct Answer ϕ = mmf/S

Ohm’s law in the case of magnetic circuits can be stated as, the magnetic flux developed in the circuit is directly proportional to magnetomotive force. The relation is similar to Ohm’s law and can be formed by replacing electromotive force (emf) with mmf and electric current (i) with magnetic flux.

Flux = mmf/reluctance.

ϕ = mmf/S

Important Points:

Magnetic circuits are analogous to electric circuits. Some of the quantities are given below.

Magnetic Circuit

Electric Circuit

Flux

Current

Permeance

Conductance

Reluctance

Resistance

Permeability

Conductivity

Flux density

Current density

Magnetic field

Electric field

Magnetomotive force

Electromotive force

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