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

A simple electromagnetic device for litting a U-shapped steel beam is shown in the diagram below. having a relative permeabillty of \( \mu_{2} \). Assume that the relative permeabilities from both materials \( \left(\mu_{1}\right. \) and \( \left.\mu_{2}\right) \) are so high that the reluctance can be ignored. The coil has a DC resistance of \( 5 \Omega \), and a DC voltage of \( 120 \mathrm{~V} \) is applied to the 400 turns coil. The air gaps between the core and the steel beam are \( 5 \mathrm{~mm} \). Calculate the MMF, the net reluctance of the magnetic circult, the magntic flux in mill Webbers. Use \( \mu_{0}=4 \pi 10 \quad{ }^{7} \) and two decimal digits. The MMF is A per Turns. The total Reluctance is A per Turnsi'vebber. The magnetic flux circulating on the core is mili Webber