Physics Units, Dimensions and Measurements Accuracy, precision of instruments and errors in measurement
If two resistors of resistances R1 = (4 ± 0.5) Ω and R2 = (16 ± 0.5) Ω are connected in series. The equivalent resistance with the limits of percentage error is:
1
(20 ± 1%) Ω
2
(20 ± 5%) Ω
3
(20 ± 0.25%) Ω
4
(20 ± 0.5%) Ω