A transformer is built by wrapping wire around the left and the right side of a rectangular “donut” of permalloy, a highly ferromagnetic substance with a relative magnetic permeability of 215. The primary coil on the left side is a solenoid that is 40 cm long, has 100 wraps of wire, and a rectangular cross-section of 2.54 cm by 2.54 cm. The secondary coil on the left side is also a solenoid with the same cross-section and length, but with 300 wraps of wire. If an AC current of 120 rms volts and 1.2 rms amps is feed into the primary, what rmsvoltage and current comes out of the secondary?
