Three Switches Outside A Windowless Room
The second switch will be connected to the.
Three switches outside a windowless room. Each bulb is switched off at present. Three switches outside a windowless room are connected to three light bulbs inside the room. Switch on the first switch leave it for a minute and then switch it off again. How can you determine which switch is connected to which bulb if you are only allowed to enter the room once.
You are outside the room and the door is closed. A windowless room contains three identical light fixtures each containing an identical light bulb or light globe. Then switch on the second switch and enter the room. Switch on the first switch leave it for a minute and then switch it off again.
Then switch on the second switch and enter the room. Turn the first two switches on and leave them on for 2 minutes. The warmer of the two. The second switch will be connected to the light that is on the first switch will be connected to the light with the warm bulb and the third switch.