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257 replies to this topic

#41 biemer_m5

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Posted 06 July 2007 - 10:31 AM

Put one switch on, than significant time after (week) you put a second one on.
Than you wait for the first bulb to burn up and you enter the room. The first one is broken, the second one is burning and the third one who was never switched on is not burning.
Hypothesis I you have ridiculous amount of time on your hand
Hypothesis II there is no abnormal production error with the bulbs.
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#42 peartree

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Posted 06 July 2007 - 10:56 AM

First of all you turn on two of the switches. Then go into the lamp room. Obviously the unlit lamp belongs to the switch you left turned off. You then remove one of the lit bulbs and return to the switch room. Undo one of the two switches that you originally switched on and touch the pair of wires together. If you get a spark, it belongs to the bulb you left in the lamp, if not, it belongs to the lamp from which you removed the bulb. So there you have it. You now know which switch belongs to which lamp - provided you haven't fried yourself of course.
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#43 Glenn

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Posted 06 July 2007 - 06:58 PM

You turn one switch on, and leave it for a considerable amount of time. You then switch that switch off. You switch another swith on and leave it on, and then you leave the last one untouched.

You enter the room...

If the bulb is on then it's the switch you have left on.
If the bulb is off and hot then you know it's the switch you turned on and left on for a while then switched off.
If the bulb is off and cold then you know it's the switch you didn't touch.
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#44 peartree

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Posted 07 July 2007 - 06:38 AM

Very good! But it's not as adrenaline pumping as my solution.
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#45 jlsims

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Posted 10 July 2007 - 01:04 PM

A lot of you guys are cheating. I'm pretty sure you are not allowed to bring in electrical equipment and batteries etc to test this stuff. Also This solution does not require a hallway in which light can peer down.


Lightbulbs these days still generate a LOT of heat. so here is what you do:

1) turn one lightbulb on and leave it on for an extended period of time. perhaps an hour or two just to be on the safe side.

2) come back and turn the old light switch off and turn on another one of your choice

3) here is where you use your one chance to walk into the room. Promptly walk into the room and note the one light being turned on. note this bulb-switch combonation.

4)now, using your hand, inspect the two off bulbs. one should still be hot from being left on so long. figure out which one is still hot and note this combination.

5) the off bulb which is cool and the switch you touched are the last combination. Now you know and you only went into the room once!

-Jlsims
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#46 finethic

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Posted 10 July 2007 - 05:39 PM

Remove one of the bulbs from the bulb holder.Now try to switch on two bulbs,two things may happen
1) two bulbs may glow

or

2) only one of them glows

by this you can know which switch belongs to which bulb.
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#47 mdsl

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Posted 10 July 2007 - 08:52 PM

Remove one of the bulbs from the bulb holder.Now try to switch on two bulbs,two things may happen
1) two bulbs may glow

or

2) only one of them glows

by this you can know which switch belongs to which bulb.


This means you went through the threshold at least twice and if you unscrewed the bulb that corresponds with the switch you did not touch, then you can't assign the other two lights to thier switches.
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#48 speshall mareens

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Posted 11 July 2007 - 03:30 AM

assumin these are not LED one can keep flikin one of the switches till the bulb birns out, enter the next room and see wich bulb broke. however, the entire entering the next rrom and checkiong has one fault. what if those lamps are the only light sorce? what do u us to check each bulb let alon find them without nocking them over and breaking them?
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#49 gldfngrd

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Posted 11 July 2007 - 04:20 AM

k, turn 2 lights on, wait a few minutes, shut one of them off, walk into the other room, the switch you left in the on position is connected to the light thats on, touch the bulbs the warm the one is the one you had on but then turned off, and the third cold one is the one you hadnt touched the switch for. Assuming that they are regular light bulbs, carbon filament whatever bulbs.
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#50 Nytetears

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Posted 12 July 2007 - 02:21 AM

The easiest way would to be leave switch 1 off and turn on switch 2 and 3.
Wait a bit then turn off switch 2.
Enter the room.
The light bulb that is lit is switch 3 the light bulb that is off but warm is switch 2 and the light bulb that is off and cold is switch 1
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