Question

The "Ohm's law" for the magnetic circuit States that the net magneto-motive force (mmf) equals the product of the core reluctance and the core flux.

(a) True

(b) False

Short answer

Therefore, the correction option is (a): True

Step-by-step solution

State the ohm’s law for magnetic circuit.

The ohms says that the MMF in the circuit is directly proportional to the magnetic flus in the circuit.

$\mathit{F}\mathit{}\mathit{\alpha }\mathit{\varphi }$

$\mathbf{F}\mathbf{=}\mathit{\varphi }\mathit{R}$

Here, $F$is the MMF,$\varphi$is the flus and is the proportionality constant reluctance.

The MMF in the current is defined as the product of the number of the turns and current flowing through it.

$\mathbf{F}\mathbf{=}\mathbf{Nl}$

Find the net magneto motive force in the circuit.

The ohm’s law equation for the magnetic circuit is given by,

$N_1{l}_1-N_2{l}_2=\mathfrak{R}\varphi$

From the above equation, the net MMF is directly to product of reluctance and core flux.

Therefore, the correction option is (a): True