Coupled inductors
Ideal coupled inductors (SPICE K): L1 1 mH, L2 1 mH, coupling k = 0.99, mutual inductance M = 990 µH. Turns ratio about 1 : 1.00. The dots mark the ends that rise together. No resistance and no core: for a real mains transformer use the transformer part.

Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Pins
- L1 • (dot)
- L1
- L2 • (dot)
- L2