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If a man has three bulbs on the third floor of his house and three switches in his basement how can he figure out which switch is wired to each bulb in only one trip from his basement?
Wiki User
∙ 15y ago
Go down to the basement and turn on two light switches. Wait a few minutes and turn one of them off. Go back upstairs and the one that is on goes to the light switch that is on. The light bulb that is hotter than the other light bulb goes to the one that you turned on and then turned off. and the last one goes to the switch that you never turned on.
Wiki User
∙ 15y ago
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The independent variable for a light bulbs?
The colour of the electricity cables!
What is the difference between 1157 and 2357 bulbs?
2357 - 1157 = 1200
How many iris bulbs to plant in 6 inch pot?
Iris do not have bulbs- they have a rhizome, a specialized root, and do not grow in small pots. Even one root in a 6 inch pot would not work.
What are some things that comes in groups of eight?
light bulbs, octopus, spiders legs,and chairs.
There are 144 boxes in a crate. each box holds 72 bulbs.how many bulbs are in a crate?
10,368
Can you control each of the bulbs arranged in series using switches?
The switches would have to be of a type that could switch out a bulb and at the same time switch in its place a resistor of equivalent value.
What bulbs glow when switch A is closed and switches B and C are open?
it's bulb 3
On a ground floor home there are three switches connected to 2 bulbs and 1 fan - how do you know which switch is for the fan and which are for the 2 bulbs?
You left out the most important parts of the riddle. The way the questionis worded, all you have to do is turn one switch on, walk over to where thefan and the bulbs are, see which one is on, mark the switch, and do thattwo times.The way the riddle works: The switches are on the ground floor of the house,and the bulbs and the fan are on the 3rd floor. Now, how do you figure outwhich switch controls what, without climbing the stairs more than once ?-- Stand by the switches. Turn 2 of them ON. Wait 15 minutes.Then turn one of the 2 OFF, and turn the 3rd one ON.Then run upstairs and see what you have there.-- Whatever is OFF ... either the fan or 1 bulb ... belongs to the switch that's OFF.Now you only have to associate the 2 remaining switches with the 2 remaining items.-- If 2 bulbs are ON, then they belong to the 2 switches that are ON.One bulb is cool, and the other one is warm.-- If only 1 bulb is ON, then it's either cool or warm.-- A warm bulb that's ON belongs to a switch that was ON for 15 minutesbefore you ran upstairs.-- A cool bulb that's ON belongs to the switch that you turned ONjust before you ran upstairs.You have identified all 3 switches with only one trip up the stairs.
What is the noise emanating from a dimmer switch?
All dimmer switches hum. The older they get, the louder the hum. If you have compact florescent bulbs in the fixture, this will cause the switch to hum louder.
How do I turn on three light bulbs in sequence using one switch?
To do something like that you would first have to have each light on it's own smart switch. Then you would need a master switch that would control each of the other smart switches. You can find switches like this at www.smarthome.com
There are 3 switches downstairsEach corresponds to one of the three light bulbs in the attic.You can turn the switches on and off and leave them in position.How would you identify which switch corresp?
Turn switch A on and then wait for a couple minutes. Turn switch A off and switch B on. Go to the attic, one light bulb should be on, that's switch B. Now feel the light bulbs, one should still be warm from having been turned on and then off, that's switch A. The one that's off and cool is switch C.
If a chandelier has 5 bulbs how can it be re-wired to switch on separately 3-2 bulbs?
How did you want to switch on the bulbs? If there isn't a separate circuit already running from the switch, through the wall, and to the chandelier, then you'd have buy pull chain switches. The chandelier would have to have holes drilled to mount the switches. The load wire from the house would be wired to the load side of each switch. Then two bulbs to one switch and three bulbs to the other switch. All the neutrals would tie together to the neutral from the house. I would HIGHLY recommend just purchasing a dimmer switch from your local hardware or home center. You could easily change the switch in the wall to a dimmer switch and have a lot more control over the illumination, and it wouldn't look like you have burned out light bulbs in your fixture. You can rewire a 5-bulb light for a 3-2 switch in a couple of other ways. Remove the light from the ceiling, open the lamp wiring and divide the selected 3 and 3-light sets. All of the neutral wires stay together (usually wired to the screw shell of the lamp holders). Add a 3-way switch in the fixture (e.g., off, 3-on, 5-on, or off, 2-on, 5-on) or bring each group of 3 and 2 hot wires out to separate wall switches. Switch 1 is 2 bulbs, switch 2 is the other 3 bulbs, and switch 1 and 2 together is all 5 bulbs. Or you can put all or some of them on dimmers.
Can xenon lamps be used with a dimmer switch?
120 volt xenon bulbs are fully dimmable just like a regular incandescent bulbs, using regular old 120 volt dimmer switches.
You are in a room that has 3 switches and a closed door The switches control 3 light bulbs on the other side of the door Once you open the door you may never touch the switches again?
Turn on one light and leave it on for a little while then turn it off. Turn the next light on and open the door. Go up and feel the light bulbs..the warm one is the first loth switch,, the one that is still on is obviously the second light switch and the cold/regular temperature light bulb is the last switch that you didn't touch.
How do you wire two bulbs for one switch?
The two bulbs will be wired in parallel with each other. The switch will be wired into the circuit upstream of the bulbs.
Most flashlights have series circuits true or false?
Yes. Most flashlights have a series circuit involving a battery, a switch, and a bulb. More complex variants might have two bulbs in parallel, two or more bulbs on two switches, etc. but the basic principle is a series circuit - turn the switch on and the bulb illuminates.
Is there a dimmable CFL bulb that can be used with an electronic dimmer?
Compact fluorescent bulbs used to be all or nothing. They couldn't be dimmed. Most cfl lamps (bulbs) are this kind. However, special cfl bulbs are now being marketed, at a higher price, that can be dimmed by a normal dimmer switch previously used for incandescent bulbs. However, not all dimmer switches work with these newer dimmable cfl lamps.
