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

[单选题]
By averaging three measurements of the s7yeyzi : xrg1;amnr t+/d3+zvthm.gg4i e quantity which of the following can be reduced? r. gtzhintv3+g+m 4d/

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 arisem(fm7 o3+(vfa06v yh owlof /z due to faulty instrumentation or consistently bad technique. Averaging repeated measurements will not change a systematic bias. So B & C are incorrect. Zero errors are examples of systematzfm v(/ o6aofmyov7l(f hw+30ic 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.