(Solved): A simple electromagnetic device for lifting a U-shapped steel beam is shown in the diagram below. T ...

A simple electromagnetic device for lifting a U-shapped steel beam is shown in the diagram below. The U-shapped steel beam being lifted is solid material having a relative permeability of $\mu 1$ with a $15\mathrm{cm}$ depth. The magnetic core is also $U$-shaped with a $15\mathrm{cm}$ depth, but it is built out of high-grade magnetic material having a relative permeability of $\mu 2$. Assume that the relative permeability of both materials are infinitive. The coil has a DC resistance of $5\Omega$, and a DC voltage of $120\mathrm{V}$ is applied to the coil. The air gaps between the core and the steel beam are $5\mathrm{mm}$. Calculate the MMF, the net reluctance of the magnetic circuit, and the total magnetic flux. Use $\mu 0=4\pi 10-7$. The magnetic motive force is The total reluctance is The magnetic flux for this circuit is A.t 1.t/Wb $\mathrm{mWb}$