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Potential Divider Definition, AQA Physics watch

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    What is the definition of potential divider according to the mark scheme of AQA?
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    I don think there is a definition to learn. Just understanding how they work so you can apply it to calculations. I could be wrong though
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    I thought it was two or more resistors connected to a source of fixed pd?
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    I found the question but I don't know where its from. all i know that its from the new spec

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    The mark scheme answer is: A combination of resistors in series connected across avoltage source.
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    A potential divider is a simple circuit that uses resistors/thermistors/LDRs to supply a variable potential difference.
    At its simplest, a potential divider is a circuit with a voltage source and resistors in series. The potential of the voltage source (e.g. power supply) is divided in the ratio of the resistances.

    This means that if you had a 2 ohm resistor and a 3 ohm resistor, there would be 2/5 of the p.d. across the 2 ohm resistor and 3/5 of p.d. across the 3 ohms. Therefore resistances can be chosen to get a required voltage across one of the resistors.

    This pretty much explains it fully in different ways, but it's all correct!
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    (Original post by Starlotte)
    A potential divider is a simple circuit that uses resistors/thermistors/LDRs to supply a variable potential difference.
    At its simplest, a potential divider is a circuit with a voltage source and resistors in series. The potential of the voltage source (e.g. power supply) is divided in the ratio of the resistances.

    This means that if you had a 2 ohm resistor and a 3 ohm resistor, there would be 2/5 of the p.d. across the 2 ohm resistor and 3/5 of p.d. across the 3 ohms. Therefore resistances can be chosen to get a required voltage across one of the resistors.

    This pretty much explains it fully in different ways, but it's all correct!
    I understand it better now, thank you very much
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    (Original post by Megannk)
    The mark scheme answer is: A combination of resistors in series connected across avoltage source.
    Thanks man, I appreciate the help
 
 
 

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