Q3.10Multiple correct
The measurement of an unknown resistance R is to be carried out using Wheatstones bridge (see Fig. 3.25 of NCERT Book). Two students perform an experiment in two ways. The first students takes R2 = 10Ω and R1 = 5Ω. The other student takes R2 = 1000Ω and R1 = 500Ω. In the standard arm, both take R 3 = 5Ω. R2 Both find R = R 3 = 10Ω within errors. R1
This question refers to a figure in the original PDF.
- (a)The errors of measurement of the two students are the same.
- (b)Errors of measurement do depend on the accuracy with which R2 and R 1 can be measured.
- (c)If the student uses large values of R2 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. Current Electricity