Question

Which of the following experimental techniques reduces the systematic error of the quantity being investigated?

A. timing a large number of oscillations to find a period
B. measuring the diameter of a wire repeatedly and calculating the average
C. adjusting an ammeter to remove zero error before measuring current
D. counting down to start the stop-watch at zero in timing oscillations

Answer 1

Answer is C. adjusting an ammeter to remove zero error before measuring current