When I add additional voltage it is reduced

Discussion in 'Homework Help' started by droggie, Oct 25, 2012.

  1. droggie

    Thread Starter Member

    Oct 21, 2012
    137
    1
    When I run a 12 v computer fan with a 9 v battery it runs fine, but when I added two 1.5 v batteries to the breadboard it slows down, the voltage is almost cut in half. What could be the cause of this?
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    If you connect a 3V battery to a 9V battery in parallel then the voltage becomes 3V and the 9V battery is shorted and will have a very short life.

    You need to learn something about series and parallel.
     
  3. droggie

    Thread Starter Member

    Oct 21, 2012
    137
    1
    Thank you. I have learned something today.
     
  4. crutschow

    Expert

    Mar 14, 2008
    13,000
    3,229
    If you want the voltages to add you connect the batteries in series, plus to minus to plus to minus, etc.
     
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