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Thread: Volts

  1. #1 Volts 
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    Can I power a 120 volt light bulb with a current less than 120 volts?
    All rechargeable AA batteries have a 1.2 volt ratting, while regular AA's have a 1.5 Volt ratting, is this a problem, as in, would putting a 1.2 volt battery in a 1.5 volt device hurt it or show any difference in performance?
    Can I plug a light bulb directly into the wall?
    Would connecting a plug and two wires into the wall outlet, and connecting the two wires for ma 120 Volt electromagnet without shorting the house?


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  3. #2 Re: Volts 
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    Quote Originally Posted by Cold Fusion
    Can I power a 120 volt light bulb with a current less than 120 volts?
    yes, but at reduce brightness
    All rechargeable AA batteries have a 1.2 volt ratting, while regular AA's have a 1.5 Volt ratting, is this a problem, as in, would putting a 1.2 volt battery in a 1.5 volt device hurt it or show any difference in performance?
    doubtful. the problem here is if you connect more than one cell in series. one example would be a device that used 4 cells at 1.2 volts and you replaced them with 4 of 1.5 volts. the first case gives 4.8 volts while the second gives 6
    Can I plug a light bulb directly into the wall?
    no. you have to wire a socket with 2 leads, screw the bulb into the socket the plug the leads into the wall socket.
    Would connecting a plug and two wires into the wall outlet, and connecting the two wires for ma 120 Volt electromagnet without shorting the house?
    don't know about this one.
    you need to make a distinction between volts and current.
    for example what is "ma 120 volt"?


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  4. #3 Re: Volts 
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    All rechargeable AA batteries have a 1.2 volt ratting, while regular AA's have a 1.5 Volt ratting, is this a problem, as in, would putting a 1.2 volt battery in a 1.5 volt device hurt it or show any difference in performance?
    doubtful. the problem here is if you connect more than one cell in series. one example would be a device that used 4 cells at 1.2 volts and you replaced them with 4 of 1.5 volts. the first case gives 4.8 volts while the second gives 6
    An overvoltage (the 4 1.5V batts) should generally still be ok since most devices use a voltage regulator, there would be extra heating but should be ok in low power devices, the VR's have a thermal shutdown anyway. The 4 1.2V batteries in a device that takes 1.5V batteries might work, it can't do any damage.
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  5. #4  
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    One time I tapped a speaker wire to the connections of a light bulb, and taped it to the input area of a old receiver while it was on. It worked great actually.

    You can buy the plugs to connect any device to through the wall outlet.
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

    -Einstein

    http://boinc.berkeley.edu/download.php

    Use your computing strength for science!
    Reply With Quote  
     

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