A Levels Physics

What will reduce the systematic errors when taking a measurement?
A adjusting the needle on a voltmeter so that it reads zero when there is no potential difference
across it
B measuring the diameter of a wire at different points and taking the average
c reducing the parallax effects by using a marker and a mirror when measuring the amplitude
of oscillation of a pendulum
D timing 20 oscillations, rather than a single oscillation, when finding the period of a pendulum


Systematic and Random Errors | 2012 - O/N - 9702/13 | Q6