Question

Can you think of an example where you would have a very small percent difference between repeated measurements but still be very inaccurate? Can you think of two examples?

Basic physics question, please help.

Answer 1

While doing experiments, we often might have very small percentage difference between repeated measurement the term generally we called it as precision

precision : It indicates the degree of closeness between the measured values.

In a real time experiments , for a good instrument we expect an high accuracy with precision but sometimes we might experience ​​​​in calculations that high precision and not accurate .

Suppose take a two examples as below :

Ex 1) :- while measuring 10A current in the electrical or electronic circuit analog instruments measures values as 9.42 , 9.40, 9.41, 9.40 Amps as values are very close to each other but not accurate results. Hence it should be very close to true value for 10A such as 9.97, 9.98 ,9.96 ,9.98 Amps for accurate and with precision

EX 2) suppose take an example that hitting an targets closely to each other but very far from the actual targets as shown in the picture below

Hence , conclusion from the above following is in order to have a accurate measurement they need to both precise and accurate