First slide

Accuracy; precision of instruments and errors in measurements

Question

The resistance $R = \frac{V}{I'} w h e r e V = (100 \pm 5) V a n d I = (10 \pm 0.2) A .$ The percentage error in R is

Moderate

A

5%
B

2%
C

3%
D

7%

Solution

The percentage error in V is 5% and in I it is 2%.
Hence, the total error in R would be
% error = 5%+ 2%= 7%

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