Important: Meaurements and Errors

Question 1

Definition of uncertainty

Answer 1

Maximum error

half a division on either side of the smallest unit on the scale

Question 2

How to calculate uncertainty

Answer 2

Half of the graduates divisions

Eg. Scale = up by 0.1

Uncertainty = 0.1 / 2 = 0.05

Question 3

Formular for % error ( uncertainty)

Answer 3

( Max error ( uncertainty) / value of measurement ) x 100