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    http://www.thestudentroom.co.uk/atta...1&d=1364228860
    WHY is a potential divider needed in the circuit? Is it so that the voltage can easily be adjusted? If so, why can't you just use a variable resistor like the one in this link:
    https://encrypted-tbn1.gstatic.com/i...7-5Tjqu6AAKBa0
    ??

    Thanks you .
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    Potentiometers are essentially potential dividers, and they can be used as variable resistors. The purpose of a potential divider circuit is to vary the output p.d., which is what you are being asked to do.
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    (Original post by Brister)
    Potentiometers are essentially potential dividers, and they can be used as variable resistors. The purpose of a potential divider circuit is to vary the output p.d., which is what you are being asked to do.
    But why can't you have a variable resistor instead? The MS mentions nothing about it. Or is it that it's one of the components shown there?
    Thanks
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    You may get away with it on an exam, but that is not for me to say. Your teacher should know better than I do. At least for my exam board, we only had to know about the basic potential divider circuit.
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    (Original post by Brister)
    You may get away with it on an exam, but that is not for me to say. Your teacher should know better than I do. At least for my exam board, we only had to know about the basic potential divider circuit.
    Thank you
 
 
 
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