1. mikeg1958

    Thread Starter New Member

    Apr 24, 2008
    can someone explain capacitors to me, if i have a dc battery connected to a cap and a resistor, what charge is on pos side and neg side of cap,
    thank u very much mike
  2. SgtWookie


    Jul 17, 2007
    If you connect a capacitor in series with a resistor, and connect them across a battery or other voltage source, the capacitor will charge or discharge through the resistor as necessary until eventually the voltage across the capacitor is nearly the same as the voltage across the battery or other supply, and the current in the resistor is nearly zero.

    All capacitors have some "leakage current". This is why they will never charge completely to the same potential as the voltage source.

    If your capacitor has polarity markings on it, then it is an electrolytic or a polarized tantalum capacitor. You must make sure to connect these types of polarized capacitors so that the (-) lead will always have a more negative voltage than the positive lead. If you attempt to charge them in reverse of their polarity, they may overheat and explode due to high leakage current.