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    Hi the exam is on Monday and I still find electricity confusing and struggle to apply the rules to questions. Particle physics is pretty much ok but any tips would be greatly appreciated.
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    Still stuck if anyone could help. Rules and how to apply them mainly and internal resistance.
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    (Original post by rowan131)
    Still stuck if anyone could help. Rules and how to apply them mainly and internal resistance.
    You probably won't get a reply to such a vague question.
    It would be much better if you posted a specific problem on, say, internal resistance that you are stuck on.
    Say what you can do and where you are stuck.
    There should then be plenty of offers of help.
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    Ok thanks internal resistance and long mark written questions 3-4 marks are probably most difficult for me, superconductivity and resistivity is fine. question 6b on this paper I don't get it. http://filestore.aqa.org.uk/subjects...W-QP-JAN10.PDF
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    The electrical power (energy per second) supplied is emf times current
    As all the cells have the same emf, then the ones passing the most current will use up more energy per second and go flat sooner.

    So the question needs you to know which cells pass moret current.
    The circuit setup means that the current through the series cells then splits two ways through the parallel cells.
    So which cells pass more current.
    These will go flat first.
 
 
 
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