The measurement of an unknown resistance R is to be carried out using Wheatstone bridge (see Fig. 2(EP).3). Two students perform an experiment in two way. The first student takes `R_(2)=10 Omega` and `R_(1)=5Omega`. The other student takes `R_(2)=1000Omega` and `R_(1)=500Omega`. In the standard arm, both take `R_(3)=5Omega`. Both find `R=(R_(2))/(R_(1))R_(3)=10Omega` within errors.
A
The errors of measurement of the two students are the same
B
Errors of measurement do depends on the accuracy with which `R_2 and R_1` can be measured
C
If the student uses large values of `R_2 and R_1` The currents through the arms will be feeble. This will make determination of null point accurately more difficult
D
Wheatstone bridge is a very accurate instrument and has no errors of measurement
Text Solution
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The correct Answer is:
B, C
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D
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