PDA

View Full Version : light bulbs



synthia
09-19-2002, 02:18 AM
Hi,
Figure this out.

There r 3 switches in a room corresponding to three bulbs in the terrace. We do not know which switch belongs to which bulb. We can only go to the terrace once.Also, the room is perfectly shielded with nil reflections coming thro'. How do we find out??

I actually don't know the answer.:shy::o:p

dkpbus
09-19-2002, 07:13 AM
Originally posted by synthia

Hi,
Figure this out.

There r 3 switches in a room corresponding to three bulbs in the terrace. We do not know which switch belongs to which bulb. We can only go to the terrace once.Also, the room is perfectly shielded with nil reflections coming thro'. How do we find out??

I actually don't know the answer.:shy::o:p


very Simple

1. Switch on 1st switch this will lit one bulb
2. Switch on 2nd Switch this will lit 2nd bulb
3. Wait for some time and switch off 2nd bulb.
4. Immediately go up.
5. Touch the two off bulbs, One is hot and one is cold.
6. So 1st Switch corresponds to glowing bulb.
7. 2nd Switch corresponds to Hot bulb.
8. and 3rd Switch Corresponds to cold bulb....

:p
DKP

synthia
09-20-2002, 02:46 AM
Hi,

Good work there! WE used to ask this in our college. I came across the same a few days back.But,I found it interesting! Now we all know how!!!