Magnetic Circuits Problems And Solutions Pdf May 2026

A magnetic circuit has a coil of 500 turns, a core with a cross-sectional area of 0.05 m², and a length of 1 m. If the current through the coil is 10 A and the magnetic flux is 0.5 Wb, find the relative permeability of the core.

The magnetic flux is given by:

S_air = lg / (μ₀ * A) = 0.0005 / (4π x 10^(-7) x 0.02) = 1989 A/Wb magnetic circuits problems and solutions pdf