• Question: Can you explain Ohm's Law please?

    Asked by allij021 to Cathal, Daphne, Darren, Jon, Katherine on 12 Mar 2012.
    • Photo: Cathal Breen

      Cathal Breen answered on 12 Mar 2012:


      Ohm’s law is goverened by the equation V=IR where
      V=Voltage
      I = Current
      R = Resistance. In electrical practice Voltage or V is always the power supply such as a battery or mains. V drives current through a circuit. Current or I flows through a circuit and can flow freely or can meet much resistance to flow and this is what R stands for. If a circuit has too much resistance not a lot of current can flow and vice versa.

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