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

[单选题]
By averaging three mbwp l( a,lqgt)1o/xn +easurements of the same quantxmojb,ja:k4ds pz : 15ity which of the following can be r:ko p1jb: 5x4zsd ,amjeduced?

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 consistye3 ekw a-vd0k4m l,6yently 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 too high and at other times too low – so averaging them will have the effect of reducing the random errore v-d,kyk304w l6eya m. Hence A is correct.