Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    14
    ReputationRep:
    Ive got a pretty incomptent physics teacher for gcse so im reading up over topics in the holidays.

    If anyone could answer these questions, it'd be great
    What's the difference between current and charge?
    Which way does the charge flow?
    Which way does the current flow?
    What's the difference between parallel and series circuits?
    Offline

    0
    ReputationRep:
    Charge is just charge, e.g. electrons have a charge of -e. Current is the flow of charge (it is measured in coulombs of charge passing through a point in the circuit per second). Conventional current flows from positive to negative, the opposite direction to electron flow which is from negative to positive. In a circuit, the electrons are the charges and so that is the direction in which the charge moves. You can have electrolysis though in which ions are the charges which move, in which case there are both positive and negative charges, again the negative charged ions moving from negative to positive like electrons whilst the positive ions move in the opposite direction. A series circuit is on in which components are joined one after another, whereas a parallel circuit is one in which components are joined over one another. A circuit can have both parallel and series parts to it.
    • Thread Starter
    Offline

    14
    ReputationRep:
    (Original post by alphanick)
    charge is a property representing the flow of electrons, current is one unit of charge (si unit = coulombs) per unit of time (second), so it is q s-1, or amperes, a. This is because charge and current are unified by:





    charge is the flow of electrons, so it flows from the negative terminal to the positive terminal.

    Conventional current flows from the positive terminal to the negative terminal.

    In series circuits, components are connected to each other by a wire. In parallel circuits, components are connected by wires which connect to the existing wire (which is in series) as so - left = parallel, right = series:

    thank you!!!!!!!
    • Thread Starter
    Offline

    14
    ReputationRep:
    Btw, Can anyone tell me the circuit rules for each type of circuit, parallel and series?
    • Thread Starter
    Offline

    14
    ReputationRep:
    [QUOTE=AlphaNick;48694240]In series:
    - current is equal everywhere




    - total voltage / p.d. is the sum of all other p.d.s of components




    - total resistance is the sum of all other resistances of components





    In parallel:
    - current is the total sum of all components




    - voltage / p.d. is equal for all components




    - resistance is the reciprocal sum of all other resistances



    (you don't need to know this one for GCSE)
    [/QUOTE

    Well, Mr, you've just saved my life
    My physics teacher is absolutely crap plus i've not done anything properly on circuits in KS3 either so literally this could be the jump from one grade to another.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Did TEF Bronze Award affect your UCAS choices?
    Useful resources

    Study tools

    Rosette

    Essay expert

    Learn to write like a pro with our ultimate essay guide.

    Thinking about uni already?

    Thinking about uni already?

    See where you can apply with our uni match tool

    Student chat

    Ask a question

    Chat to other GCSE students and get your study questions answered.

    Creating

    Make study resources

    Create all the resources you need to get the grades.

    Planner

    Create your own Study Plan

    Organise all your homework and exams so you never miss another deadline.

    Resources by subject

    From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

    Papers

    Find past papers

    100s of GCSE past papers for all your subjects at your fingertips.

    Help out other students

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.