Since a bulb is eliminated from parallel (resistance), this tells us that the equivalent resistance on bulb 3 is greater. So, less current through bulb 3...
Total resistance of the circuit increases, the voltage stays constant, so the current flowing through battery decreases. This should mean that the current entering the junction between the switch and bulb 3 decreases
Homework Statement
Four identical light bulbs are connected to a battery as shown in the diagram. Switch S is originally closed. If switch S is opened, what happens to the brightness of each bulb?
Homework Equations
V=IR
The Attempt at a Solution
- By opening the switch, no more current...