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    (Original post by marinacalder)
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    also a confusion about electricity in general- when finding resistance between two named points, do I calculate the whole circuit resistance?
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    (Original post by marinacalder)
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    This class of question tries to disorient you with a weird circuit diagram


    Literally try drawing a circuit diagram that doesn't suck

    e.g.

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    and see if you can recognise how to deal with it then
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    (Original post by marinacalder)
    ...
    Top = R1, Left = R2, Middle = R3, Bottom = R4.

    There are 3 paths the current can take to get from X to Y; simplify to 2, then 1. R3 & R4 are in parallel; find equiv series resistor, add to R2. Net resistance is then in parallel with R1. You should get 1.2 Ω.
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    Oh good! I think its the mark scheme- its from a questions by topic type thing from the internet so probably not that reliable
    (Original post by Physics Enemy)
    Top = R1, Left = R2, Middle = R3, Bottom = R4.

    There are 3 paths the current can take to get from X to Y; simplify to 2, then 1. R3 & R4 are in parallel; find equiv series resistor, add to R2. Net resistance is then in parallel with R1. You should get 1.2 Ω.
 
 
 
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