First slide

Accuracy; precision of instruments and errors in measurements

Question

The resistance $R = \frac{V}{I}$ , where $V = (100 \pm 5.0) V$ and $I = (10 \pm 0.2) A$ . Find the percentage error in R.

Moderate

A

7%
B

5%
C

3%
D

9%

Solution

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

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