0 Uncertainties Flashcards
(21 cards)
Pico (p)
1 x 10⁻¹²
Nano (n)
1 x 10⁻⁹
Micro (µ)
1 x 10⁻⁶
Milli (m)
1 x 10⁻³
Kilo (k)
1 x 10³
Mega (M)
1 x 10⁶
Giga (G)
1 x 10⁹
Tera (T)
1 x 10¹²
What is Scale Reading Uncertainty
Uncertainty in a measurement due to the scale used.
= ± 1 of smallest division for digital scales.
= ± 1/2 of smallest division for analogue scales.
What is Random Uncertainty
The uncertainty that occurs due to variations in repeated measurements.
What is Systematic Uncertainty
When readings taken are all too large or too small. This can be caused by measurement techniques or experiment design
What is Absolute Uncertainty
An uncertainty given with the appropriate unit.
E.g. 6.5 V ± 0.1 V
(6.5 ± 0.1) V
What is Percentage Uncertainty
An uncertainty given as a percentage.
e.g. 6.5 V ± 1.5 %
What is an Uncertainty given as in its final Answer
The largest percentage uncertainty of all the individual uncertainties.
What is Accuracy
How close a value is to its true value. (Significant figures)
What is Precision
How consistent results are when measurements are repeated.
What is Reliable
Repeating measurements in an experiment.
What are Significant figures
Two more or 1 less than least accurate value.
What is the Mean
The sum of measurements divided by the total number of measurements.
Measurements taken tend to form a spread around the mean value.
What is Combining Uncertainties
Percentage uncertainties are calculated and the largest chosen for final calculated values.
What is the Random Uncertainty Equation
Random Uncertainty = MaxValue - MinValue
——————————
Number of Values
