what are the similarities and dissimilarities between magnetic and electric circuit?
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Similarities:
- The close path for the magnetic flux is called magnetic circuit. The close path for the electric current is called electric circuit.
- The number of magnetic lines of force decide the magnetic flux. Flow of electron decide the current passing through the conductor.
- Flux (ф) = MMF/Reluctance Current (I) = EMF/Resistance
Dissimilarities:
- Magnetic flux does not flow but it set up in the magnetic circuit. The electric current actually flows in an electric circuit.
- At constant temperature, the reluctance (S) of a magnetic circuit is not constant but varies with μr. At constant temperature, the resistance of an electric circuit is constant as its value depends on resistivity which is almost constant.
- Once magnetic flux is setup in a magnetic circuit, no energy needed. Energy needed as long as current flows through electric circuit.
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