Plz answer my Q.,its urgent!!?

Question

Suppose there is a bulb in a room and you are sitting in an another room.You have three switches in your room.One of the switches is the swith of that bulb.Now you have to tell that out of three switches which is the switch of that bulb if you are allowed to go once in the bulb room to check whether the bulb is on or not.

Answer 1

Turn on switch #1 for one minute, then turn it off, and turn on switch #2; then go to the other room.
If the light is on, then switch #2 controls it. If not, you feel the light bulb. If it is warm to the touch, it is because it was on before, and switch #1 controls it. If it is cold, then switch #3 should be the one.

Answer 2

It is all about information and how can you get it.

Turn one light on, wait a few minutes. Turn it off. Turn on a second light and go into the room.

One light is one, so you know which switch is connected to that one.

One of the bulbs will still be hot, so you know which one you turn on before.

And that leaves only one.

My other solution is if you can see the doorway or window, but not the bulbs, you can place a object at the door away. By observing the angle of the shadows cast by that object you know whether it is the centre, left or right bulb.

Answer 3

just simple as ur question switch on any one for 5 min and change to the other and check out

1.. if bulb is not glowing and hot then first pressed switch in the switch

2>>> if bulb is burning then its second switch

3>> if its not hot and even not buring then it must be the third one

Answer 4

Switch on one switch and see what happens in the room ur sitting. Similarly do with other two switches. The one which does not respond to switch on in the room ur sitting can be the answer to ur question.

Answer 5

I would use one switch and then go see whether the light bulb was warm or not after. Then you would know it was that switch.

Answer 6

There are many ways.

But you need more info, which you can find out by inspection like which wires can be traced to that room.

Usually they must be marked at installation. Most switch have on - off marking if other two are in same position and this one is in different position then you can tell right way.

Answer 7

FIRST TURN ON FIRST SWITH FOR LONGER TIME .

THEN TURN ON SECOND SWITH & QUICKLY GO IN THAT ROOM IN WHICH BULB IS SITUATED .
IF BULB IS ON THEN SECOND SWITCH WILL BE THE SWITCH OF THAT BULB .
IF BULB IS NOT ON THEN QICKLY TOUCH THE BULB , IF BULB IS WARM THEN FIRST SWITCH WILL BE THE SWITCH OF THAT BULB .
IF BULB IS NOT WARM THEN THIRD SWITCH WILL BE THE SWITCH OF THAT BULB.

Answer 8

No-one know will be sure in it except who has made and God. or any one will check after switched on/off.

Answer 9

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Answer 10

first switch on the middle one and check it out.if it doesn`t work,then its simple to find out.if the room lies right to the room of switch then its right one and if it lies to left then its left!
hope this help.