Question

1. give the measure shown on the meter in figure 1-24 as precisely as you can. include the uncertainty in your answer.

Explanation:

Step1: Determine the scale division

The meter has a range from 0 - 5 A. There are 50 small - scale divisions between 0 and 5 A. So each small - scale division represents $\frac{5}{50}=0.1$ A.

Step2: Read the value

The pointer is between 3.7 A and 3.8 A. Estimating to the next decimal place, the reading is 3.75 A.

Step3: Determine the uncertainty

Since the smallest division is 0.1 A, the uncertainty is $\pm0.05$ A.

Answer:

$3.75\pm0.05$ A