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

    0
    ReputationRep:
    In all practice coursework we've done I've lost the P13 mark (Identifies the main sources of uncertainty and/or systematic error) and my teacher hasn't really gone into much depth as to why.

    For example, could someone give me an answer for P13 that would guarantee me the mark for a Discharge of a Capacitor experiment?
    • Study Helper
    Offline

    21
    ReputationRep:
    Study Helper
    (Original post by xBenJooo)
    In all practice coursework we've done I've lost the P13 mark (Identifies the main sources of uncertainty and/or systematic error) and my teacher hasn't really gone into much depth as to why.

    For example, could someone give me an answer for P13 that would guarantee me the mark for a Discharge of a Capacitor experiment?
    Hello and welcome to TSR.

    Whilst we are free to answer general questions concerning your understanding of the subject, it is against both the exam board and TSR rules to provide specific help with your coursework or controlled assessment which will give you an unfair advantage.

    With that in mind and to help you think in the right direction, a good way of identifying the sources of error is to look at each variable in your experiment and then ask yourself if the way the variable is measured or stated can be classed as random or systematic.

    Be sure you are clear on the definitions for systematic and random error.

    e.g. a voltmeter or clock may not measure the correct voltage or time because of a fault. The error is the same every time the measurement is made. i.e. all measurements made with the same instrument will produce the same error. This is an example of systematic.
    error. Think about how you would eliminate or minimise this type of inadvertent error.

    How do you know that the values of the components (capacitor and resistors) used are accurate? How would you eliminate and minimise such error?

    Do you know the differences between uncertainty, accuracy error and precision?

    The examples given are not exhaustive but aim to point you thinking in the right direction. Take a look at these links:

    https://www2.southeastern.edu/Academ...ystematic.html

    http://en.wikipedia.org/wiki/Systematic_error

    http://en.wikipedia.org/wiki/Random_error
 
 
 
  • 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
    Has a teacher ever helped you cheat?
  • 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

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