Uncertainty Flashcards
1
Q
What is an uncertainty?
A
The uncertainty in a measurement is the
interval within which the actual value is
expected to lie.
2
Q
What is percentage uncertainty and how
do you calculate it?
A
Percentage uncertainty in a
measurement =
uncertainty of measurement / measured value
x100
3
Q
What are different ways you can improve apparatus to give more accurate results?
A
● Increase the number of readings
● Control external variables
● Use measuring devices/equipment
with greater precision
4
Q
What are random errors?
A
Random errors cause unpredictable fluctuations in an instrument’s readings as a result of uncontrollable factors, such as environmental conditions
5
Q
How to reduce random error
A
Repeat measurements several times and calculate an average from them.
