Chapter 4 - Section 4.7 - Relative Error and Percent of Error - Exercise - Page 191: 13

0.001 A; 0.0005 A; 0.0122; 1.22%

For the given measurement, we have The precision is 0.001 A The greatest possible error is one-half the precision $0.5\cdot 0.001 \ A= 0.0005 \ A$ The relative error is $relative~error=\dfrac{greatest~possible~error}{measurement}$ $\frac{0.0005\ A}{0.041\ A}=0.0122 $ The percent of error is $1.22\%$