The measurement of an unknown resistance R is to be carried out using a Wheatstone bridge. Two students perform an experiment in two ways. The first students take = 10 and =5 . The other student takes =1000 and =500 . In the standard arm, both take = 5
Both find within errors.
(a) The errors of measurement of the two students are the same.
(b) Errors of measurement do depend on the accuracy with which and can be measured.
(c) If the student uses large values of and , the currents through the arms will be feeble. This will make the determination of the null point accurately more difficult.
(d) Wheatstone bridge is a very accurate instrument and has no errors of
measurement.
1. (a, c)
2. (c, d)
3. (b, c)
4. (c, d)
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