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    Okay so I got my AQA A AS Physics Unit 1 exam coming up. The topics are Particles, Quantum Phenomena & Electricity.

    I'm fine with the other two topics but I find electricity a nightmare and I think where I go wrong is the foundation.

    What rules do I need to know for electricity (the basic ones, most likely from iGCSE Physics)

    All I know is the resistors in parallel and series rules and the three kirchoff laws. Are there anymore that I should know?

    Is there any more rules to do with current, voltage etc?
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    (Original post by Slenderman)
    Okay so I got my AQA A AS Physics Unit 1 exam coming up. The topics are Particles, Quantum Phenomena & Electricity.

    I'm fine with the other two topics but I find electricity a nightmare and I think where I go wrong is the foundation.

    What rules do I need to know for electricity (the basic ones, most likely from iGCSE Physics)

    All I know is the resistors in parallel and series rules and the three kirchoff laws. Are there anymore that I should know?

    Is there any more rules to do with current, voltage etc?
    Voltage is the same on each branch of a parallel circuit. In series, say if you have a 10ohm resistor and a 15ohm resistor, and a 10V supply, to work out the potential difference across the 10ohm resistor, you do 10/the total resistance in this case, 10/25 and then * by 10. So the 10ohm resistor has a pd of 4V and the pd across the 15ohm resistor will be 6V as V1+V2 must equal V0.

    I will pm you the current rules if you want?
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    (Original post by particlestudent)
    Voltage is the same on each branch of a parallel circuit. In series, say if you have a 10ohm resistor and a 15ohm resistor, and a 10V supply, to work out the potential difference across the 10ohm resistor, you do 10/the total resistance in this case, 10/25 and then * by 10. So the 10ohm resistor has a pd of 4V and the pd across the 15ohm resistor will be 6V as V1+V2 must equal V0. I will pm you the current rules if you want?
    Yes please mate. So will this work for any circuit?
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    Some of this may help:

    https://www.youtube.com/watch?v=FeUw...xsfgr2qezddyls
 
 
 
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