Two resistances R1 = 100 ± 5 Ω and R2 = 150 ± 15 Ω are connected in series. If the given deviations are standard deviations, the resultant resistance and its standard deviation can be expressed as:

An ammeter reads 4.5 A when the actual current flowing in the circuit is 4.0 A. What is the relative percentage error of the measurement?

A digital multimeter has a DC voltage range of 0-25 V with an accuracy specification of ±0.5% of the measured value. If it displays 16.00 V, calculate the maximum possible measurement error: