Topic 2- Measurement Techniques Flashcards
Understand and use different measuring techniques
1
Q
List tools to measure length.
A
Metre ruler, micrometer screw gauge, vernier caliper
2
Q
List methods of measuring mass.
A
Top-pan balance, spring balance, lever balance,
3
Q
List methods of measuring time
A
Stopclock, stopwatch, digital timer
4
Q
Lost methods of measuring time.
A
Mercury-in-glass thermometer, Thermocouple thermometer
5
Q
Methods of measuring current
A
Analogue meters, digital meters, multimeters
6
Q
What is accuracy?
A
The degree to which a measurement approaches the ‘true value’
7
Q
What is precision
A
The part of accuracy which is within the control of the experimenter
8
Q
How is precision determined?
A
It is determined by the size of the random error in measurements.
9
Q
What is uncertainty?
A
The total range of values within which the measurement is likely to lie
