Scout Ahead https://www.scoutahead.org/plans/electricity-merit-badge/questions

Which of this applies to you?

Answering these takes the parts that are not for you out of Electricity Merit Badge. Nothing is required, nothing is kept on the server, and nothing is ever hidden because a question went unanswered. A step that might apply to you stays on the list and is marked.

Requirement 10: which two?

The badge says do TWO of the following. Five are built or connected and shown; one, 3-way switch wiring, is explained. A motor kit is acceptable only if your counselor approves it ahead of time.

Connect a buzzer, bell or light with a battery

Make and run a simple electric motor

Build a simple rheostat

Build a single-pole, double-throw switch

Explain 3-way switch wiring

Two lights in series, then in parallel

Back without changing anything