Series Circuit with Light Bulbs
From UO Physics Demonstration Catalog
Return to Resistance, EMF, and Current
Description:
Two light bulbs are hooked in series. A third light bulb is connected directly to a variac (120v). The two series bulbs are half as bright and when the variac is adjusted to the brightness of the series bulbs it is at 50%. When a 75w bulb and a 25w bulb are connected in series only the 25w bulb lights up. Series circuit the current is the same in both, so which bulb has a higher resistance will have the higher voltage dropped across it. so the25W bulb lights.
Location:
- Light Bulbs: Drawer 11
- Sockets: Shelf K-2
- Variac: Shelf K-4
