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

[单选题]
By averaging three meu4*6eam+3doxwnc ) llzc d2(gs7mtu2 asurements of the same quantity whqz5c1z x-2rgd ich of the following can be r 12qr z-gcxd5zeduced?

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 )iu,a ec7z-ta 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 will be sometimes t7at-uc e,za )ioo high and at other times too low – so averaging them will have the effect of reducing the random error. Hence A is correct.