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

[单选题]
By averaging three meas+yfu ; so-dmnius2k6 1urements of the same(qdhv9;mmzmg i p,1tupn6qae7,,g: l quantity which of the following can be reduced?6mvq npmgu,h q79,tel pgm:d1ai,; z(

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 faulty instrumentation or consistently bad tei8s;l9l w qvfy)pj4 8xchnique. 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 incor84v l 8)y iwsf;ljqp9xrect. 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.