Physics (AS & A Level) · Oct / Nov 2022 · Paper 11 · Question 34

Three identical filament lamps, P, Q and R, are connected to a battery of negligible internal resistance, as shown. The filament wire in lamp Q breaks so that it no longer conducts. What are the changes in the brightness of lamps P and R?

1. Alamp P brighter, lamp R brighter
2. Blamp P brighter, lamp R dimmer
3. Clamp P dimmer, lamp R brighter
4. Dlamp P dimmer, lamp R dimmer

As printed in the paper