Question

derive an expression for ohms law in magnetic circuit​

Answer 1

Answer:

Ohm's law for electric circuit is V = I R where V is voltage, I is current, R is Resistance. Ohm's law for magnetic circuit is MMF = Φ X S where MMF is magnetomotive force (NI) , Φ is flux, S is reluctance.

Answer 2

The current flowing through a conductor is directly proportional to the potential difference across it, according to Ohms law.

Explain Ohm's law in case of magnetic circuit:

• The magnetic circuit is the close path followed by the magnetic flux.
• Ohm's law states that the magnetic flux generated in the circuit is directly proportional to the magnetic motive force.

The relationship can be expressed as follows:

Ф $=\frac{N.i}{R}$

where, R stands for the circuit's reluctance.

So it can be written as$R=\frac{1}{\mu_{R} \mu_{0}A }$

hence, expression for ohms law in magnetic circuit is $R=\frac{1}{\mu_{R} \mu_{0}A }$.