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)