In a series circuit with 3 bulbs, what happens if one bulb is unscrewed and why?
1) The other bulbs will become brighter because there is less resistance in the circuit.
2) The other bulbs will become dimmer because there is more resistance in the circuit.
3) The other bulbs will stay the same brightness because the circuit is unaffected.
4) The other bulbs will turn off because the circuit is broken.