Question

Can wood, silver or yarn light up a light bulb? I think wood can carry a current.

Answer 1

Do you mean as heated filaments? In the presence of oxygen? Some of Edisons's first and longest-lived bulbs used carbon filaments.

Wood cannot carry current unless it is wet.

Answer 2

I guess if all four switches were turned on.Would just just silver ? Why wouldn't yarn? I understand wood when it is wet that makes sense.

Answer 3

I did not realize you were talking about switches to turn on and off a light bulb.

Silver should work as the blaDE and contacts of a knife switch; the others won't.

See

http://catalog.miniscience.com/catalog/electricity/Knife_Switch.html

Answer 4

Thank you! I will read the link and study. Might have other questions maybe.