For the circuit diagram below, lamp P is rated $250\,\text{V},\,50\,\text{W}$ and lamp Q is rated $250\,\text{V},\,200\,\text{W}$. Both lamps are joined in series to a $250\,\text{V}$ power supply. Take the resistance of each lamp to be constant. Which statement most accurately describes what happens when the switch is closed?
- ALamp P emits four times as much power as lamp Q.
- BLamp P emits twice as much power as lamp Q.
- CLamp Q emits four times as much power as lamp P.
- DLamp Q emits twice as much power as lamp P.