Join TSR now and get all your revision questions answeredSign up now

i am confused about absolute error and relative error Watch

    • Thread Starter
    Offline

    0
    ReputationRep:
    My physics teacher taught some knowledge about absolute error and relative error. however,He used very complicated way to explain ,he used differential coefficient .I still do not know how to get absolute error . can anyone help me by using a standard and acceptable British method(cause i am a international student) .thanks a lot.
    Offline

    3
    (Original post by claudezq)
    My physics teacher taught some knowledge about absolute error and relative error. however,He used very complicated way to explain ,he used differential coefficient .I still do not know how to get absolute error . can anyone help me by using a standard and acceptable British method(cause i am a international student) .thanks a lot.
    The absolute error is just the actual value (±) of the uncertainty in your measurement.
    If you measure a length of 100mm with a rule with a 1mm scale you could record the reading as 100 ± 1mm

    The absolute error is ± 1mm

    The relative error can be either the fractional error or the % error

    The fractional error is just the absolute error divided by the value you measured. So here it's

    1mm/100mm = 0.01

    The % error is this fraction x 100
    So its 1%
 
 
 
Poll
If you won £30,000, which of these would you spend it on?

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.