His multimeter doesn’t have an inductance ... with an incoming AC source converted to a voltage by an RC network. Once he’d worked out the design it was time to build the circuit.

The resulting AC analysis showed a nice filter ... might as well be an open circuit. Because the inductors have a 100:1 inductance ratio, the transformer has a 10:1 voltage ratio.

This course covers AC circuits under sinusoidal steady-state conditions using ... Introduction to magnetic coupling, mutual inductance, and the ideal transformer. Introduction to transfer functions, ...