Kognity IB Physics A.0 Measurements & Uncertainty (id: 92f2eca62)

[单选题]
By averaging three measurements of thep/,2aw9- aep dgwbo6j same quantity which of the followijdl+.u wja 24gla 8o/cul4t- 4 hpo7mnng can be o4udaocl+u- 24/4.awhl8ptjjg mn7l reduced?

A. Random errors
B. Systematic errors
C. Random & systematic errors
D. Zero errors


参考答案:  A


本题详细解析:
Systematic errors arise due to faulkcz (3vdypjfuh5j(5; ty instrumentation or consistently bad technique. Averaging repeated measurements will not change a systematic bias. So B & C are incorrect. Zero errors are examples of systematic errors, where a the zero of an instrument is not correctly calibrated. So D is incorrect. Random errors will5yd;3uz5ckj jhvp f(( be sometimes too high and at other times too low – so averaging them will have the effect of reducing the random error. Hence A is correct.