Random Practical Skills Flashcards
How can you ensure light gates are perfectly lined up AND ENSURE LINES ARE PARALLEL IN GENERAL
Measure the lengths between them to a common point and it should be the same
Or use a set square (funky triangle in pencil case)
Use a spirit level
Connect with a rod
What two types of errors are there
Random errors
Systematic errors
Resolution of a Vernier scale
- 01cm
0. 1mm
Resolution of a micrometre scale
0.01mm
10 micrometres
How do you use a vernier scale
Use the main scale
Line first left of vernier scale
Match scale lines, where te first line up is the value
E.g 1.1cm on main scale
0.07cm on vernier scale
How do you reduce error
Repeats and average discounting outliers
Use measuring equipment with high resolution
How do you reduce random error
Repeats and average discounting outliers
Use measuring equipment with high resolution
Parallax error
Measurement affected by viewing position
Random error
When you take measurements more than once and get a very different value
How do you reduce parallax errors
Bring eyeline as level with the scale as possible
Position measuring de ice as close to the object as possible
Systematic error
Raises or lowers all values by the same amount
How can you identify systematic error
Graph
What are error bars
Show the range of values a measurement can take due to random errors
Resolution of voltmeter
0.01V
Resolution of voltmeter
0.01V
