Three identical filament lamps, P, Q and R, are connected to a battery with negligible internal resistance, as shown. The filament in lamp Q breaks, so that it no longer carries current. What changes occur in the brightness of lamps P and R?
- Alamp P brighter, lamp R brighter
- Blamp P brighter, lamp R dimmer
- Clamp P dimmer, lamp R brighter
- Dlamp P dimmer, lamp R dimmer