`R_(1),R_(2),R_(3)` are different values `R. A,B` and `C` are the null points obtained corresponding to `R_(1),R_(2) and R_(3)` respectively. For which resistor, the value of `R` will be the most accurate and why?
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Options

A. Resistance `R_(1)`
B. Resistance `R_(2)`
C. Resistance `R_(3)`
D. All the three `(R_(1),R_(2),R_(3))` will give the same accuracy

Answer

B

Explanation

The accuracy is maximum for resistance `R_(2)`. For maximum accuracy the null point should be near the centre.