a12v curcuit connected to 24v PSU what will happen?

Discussion in 'General Electronics Chat' started by MarkSimms, Apr 13, 2016.

  1. MarkSimms

    Thread Starter Member

    Apr 6, 2016
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    if you connect a12v curcuit connected to 24v PSU what will happen? the voltages 12v and 24v could be different, I just want to know what happens ? according to ohms law more voltage less amps , but same resistance, only watts would be the same, it seems like it would work out?
     
  2. #12

    Expert

    Nov 30, 2010
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    According to Ohm's Law, double the voltage = double the current.
     
  3. profbuxton

    Member

    Feb 21, 2014
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    Formulate a theory about the result, carry out the experiment, write up the result and let us know your observations.
     
  4. dl324

    Distinguished Member

    Mar 30, 2015
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    It depends on the circuit.
     
  5. blocco a spirale

    AAC Fanatic!

    Jun 18, 2008
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    It's very easy to find out what happens when you increase the voltage across a fixed resistive load.

    Which version of Ohm's law are you thinking of?
     
  6. crutschow

    Expert

    Mar 14, 2008
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    You version of Ohm's law is not the one the rest of us use. :rolleyes:
     
  7. Willen

    Member

    Nov 13, 2015
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    If your load designed to handle 120mA at 12V (1.4 Watts) then the load's resistance is 100 ohms. If you double the supply then law says: 24V/100 ohms = 240mA (5.7 Watts). It's VERY high than needed so the circuits would be fried.

    But it depends on circuit, some circuits have been designed with wide supply input voltage, eg- a circuit regulated by 78xx regulator.
     
  8. BReeves

    Member

    Nov 24, 2012
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    I like this answer...
     
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