A-LEVEL Physics: 1.2.2: Calculating Uncertainties (SaveMyExams) Flashcards
(9 cards)
1
Q
absolute uncertainty:
A
uncertainty as a fixed quantity
2
Q
fractional uncertainty:
A
uncertainty given as a fraction of the measurement
3
Q
percentage uncertainty:
A
uncertainty given as a percentage of the measurement
4
Q
uncertainty of a reading:
A
±1/2 smallest division
eg if resolution of instrument is 1mm, uncertainty of reading will be ±0.5mm
5
Q
uncertainty of a measurement:
A
±smallest division
(*2 bc measurement is difference between 2 readings)
6
Q
uncertainty in repeated data:
A
±1/2 the range
7
Q
what do you do with uncertainties when you add the values?
A
add the absolute uncertainties
8
Q
what do you do with uncertainties when you * / the values?
A
add the percentage or fractional uncertainties
9
Q
what do you do with uncertainties when you raise the value to a power?
A
- percentage uncertainty by the power
