P=i^times 32

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  • #12108
    Phillip Cross

      how do you figure what the total circuit current is when you have L1 and L2 then between there are 2 heat elements?

      #12109
      Susan Brown
      Keymaster

        Hi Phillip,

        Great question. I’m going to step you through it with a few questions. We’ll go back and forth a bit until it’s clear to you!

        1. The fact that you have L1 and L2 as the power supply tells you what the source voltage is. Do you know what it is?

        2. You are describing two loads (elements) in series. Will the current change at different points in the circuit, or is it always the same?

        Answer those and we’ll keep going!

        #12110
        Phillip Cross

          240 volts. yes the current changes because each load has a different resistance.

          #12111
          Susan Brown
          Keymaster

            240 volts

            Correct!

            yes the current changes because each load has a different resistance.

            Ah! We’ve identified one of the things you need to clear up. This isn’t correct. Rewatch the first video in Mod. 3, unit 5 to see what we say about current in a series circuit – let me know what you find.

            #12112
            Phillip Cross

              the current is exactly the same at every point. always

              #12113
              Susan Brown
              Keymaster

                Yes!

                So, you know the voltage. Do you know the resistance of the loads?

                What Ohm’s Law equation do you think you would use?

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