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

[单选题]
By averaging three measurements of the same quantity wh xy7qr.qi o 0r;m5swp6ich of n6f q- pd.i:gnthe following can be re6.np-id:n gfq duced?

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 ki3h y u1li)j:faulty instrumentation or consistently bad technique. Averaging repeated measurements will not change a systematic bias. So B & C are l ik1h:jy 3ui)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.