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    • A variable resistor in a circuit
    Rights: Image licenced through 123RF.com Published 2 September 2010 Size: 26 KB Referencing Hub media

    A variable resistor can be used if the current needs to be varied over a range of values, changing the operation or output of the circuit.

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      Resistors

      Resistors control how much electric charge flows through a circuit each second – the size of the current in the circuit. They do this by controlling how difficult it is for electric charges to ...

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