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

[单选题]
By averaging three ma -5ny8y sj-ql+bilk4: 4oh8ufzg 0oveasurements of the same quantitzedkft7x4g1-g k6g5 x1s;xvu y which of the following can beztdx gkufx4 gsx67g1 1kve-;5 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 ):a w2)h/r sk:fm wa ybs+hmq3due to faulty instrumentation or consistently bad technique. Absmaywsfrm 3):+) hqak2h/ w :veraging 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 will 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.