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

[单选题]
By averaging three measurements of theh/a ee (4dqyy8u:q./p8xxoj0pri f5i same quantity which of the6hvh1ph4uk0fq9; r2k t512pjfz dsc m following can be rehsqp9ktkz 20r46 52p;fdhf1jhm v c1uduced?

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 f+u:vz )2u1v+/eu h0+*oh l tirldnzguaulty instrumentation or 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 inslud nv /v+ h2:+riuz)gt o+zu0euh*l1trument 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.