Light bulb switch puzzle.

[dreamlogic]

Since I dig the puzzles I'll add one.  

Situation:

1. There exists two rooms, not connected to each other.  
2. In Room 1, there is an electrical switch with 3 levers. Labeled "A", "B", and "C".
3. In Room 2, there is one light bulb, that is connected to only one of the light switches in Room 1.  The other two are duds.

Constraints and Goal:

Your goal is to determine exactly which switch controls the light bulb.  There is no possibility of telling from inside Room 1 which one controls the bulb.  You can switch the 3 switches in any position (on or off) combination and take as much time as you'd like, while you are still in Room 1.

However, when you leave and enter Room 2, upon inspection of the light bulb, you should immediately be able to tell exactly which one of the switches in Room 1 controls the bulb.  Remember, after leaving Room 1, you cannot come back in to re-adjust the switches.

Now explain how you can be able to determine which switch controls the bulb, and your reasoning.

[YAX]

Answer is now hidden until you reply!

 
 

[dreamlogic]

Nice nice.  How about bleepin it now for others? LOL

[Mr. Complicated]

i will tell you after i reply to this thread to get the answer...

[hmg-eng]

Well if it is an incandescent light bulb, they get very hot when they are on, because they are basically just a resistor.  So this is what you can do. Switch one on. Wait about 1 min, keep switch one in the on position, then switch the second one on and run to the other room immediately, assuming it isn't too far.

Then when you get to room 2 if the light bulb is on, you can touch the bulb to see how hot it is. If it is very hot then it was the first lever. If it is on but not very hot then it is the second lever. If it isn't on at all then it would be the third lever.

[distressKing]

Since I dig the puzzles I'll add one.  

Situation:

1. There exists two rooms, not connected to each other.  
2. In Room 1, there is an electrical switch with 3 levers. Labeled "A", "B", and "C".
3. In Room 2, there is one light bulb, that is connected to only one of the light switches in Room 1.  The other two are duds.

Constraints and Goal:

Your goal is to determine exactly which switch controls the light bulb.  There is no possibility of telling from inside Room 1 which one controls the bulb.  You can switch the 3 switches in any position (on or off) combination and take as much time as you'd like, while you are still in Room 1.

However, when you leave and enter Room 2, upon inspection of the light bulb, you should immediately be able to tell exactly which one of the switches in Room 1 controls the bulb.  Remember, after leaving Room 1, you cannot come back in to re-adjust the switches.

Now explain how you can be able to determine which switch controls the bulb, and your reasoning.

SO there is only one switch... so turn on all the levers to the on position... and you got it.. because all three levers connects to that one switch.. right.. 

[Darksyde]

I want to see this answer...

[hmg-eng]

SO there is only one switch... so turn on all the levers to the on position... and you got it.. because all three levers connects to that one switch.. right.. 

I think you missed understood the question. The question is very poorly worded, I'm pretty sure he meant switch and lever to be the same thing. If you were just trying to turn on the light bulb then yes just turn all the levers to on and the bulb would be on. But what we are trying to figure out is which lever is the one that will turn the bulb on.

Where is the answer to this trivia anyways?

[YAX]

k.

[hmg-eng]

My bad, I didn't read through the posts.

[Pineapple]

Um....only posting to see the answer! 

[jetter]

hmg-eng got the answer, it's a very basic interview question.

[ToxicCum]

Heres my answer:

Content is hidden until you reply to this topic.

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Man, I dont know how to hide the answer like Yax....can someone tell me how to hide it for future reference?

[Spooki]

 

[distressKing]

TUrn on one and hope it;s the right one.