`R_1, R_2, R_3` are different values of `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 X will be the most accurate and why?

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 X will be the most accurate and why? .

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 X will be the most accurate and why? .

An unknown resistance X is to be determined using resistances R_1, R_2 or R_3 . Their corresponding null points are A, B and C. Find which of the above will give the most accurate reading and why? . R= R_1 or R_2 or R_3 .

An unknown resistance X is to be determined using resistances R_1, R_2 or R_3 . Their corresponding null points are A, B and C. Find which of the above will give the most accurate reading and why? . R= R_1 or R_2 or R_3 .

Three resistors R_1, R_2 and R_3 are to be combined to form an electrical circuit as shown in the figure. It is found that when R_1 R_2 and R_3 are put respectively in positions A, B and C, the effective resistance of the circuit is 70 Omega When R_2, R_3 and R_1 are put respectively in position A, B and C the effective resistance is 35 Omega and when R_3, R_1 and R_2 are respectively put in the position A, B and C, the effective resistance is 42 Omega The resistance R_(1): R_(2): R_(3 ) are in the ratio

Three resistors R_1, R_2 and R_3 are to be combined to form an electrical circuit as shown in the figure. It is found that when R_1 R_2 and R_3 are put respectively in positions A, B and C, the effective resistance of the circuit is 70 Omega When R_2, R_3 and R_1 are put respectively in position A, B and C the effective resistance is 35 Omega and when R_3, R_1 and R_2 are respectively put in the position A, B and C, the effective resistance is 42 Omega If R_(1), R_(2) and R_(3) are put in series, the effective resistance will be

Three resistors R_1, R_2 and R_3 are to be combined to form an electrical circuit as shown in the figure. It is found that when R_1 R_2 and R_3 are put respectively in positions A, B and C, the effective resistance of the circuit is 70 Omega When R_2, R_3 and R_1 are put respectively in position A, B and C the effective resistance is 35 Omega and when R_3, R_1 and R_2 are respectively put in the position A, B and C, the effective resistance is 42 Omega If R_(1), R_(2 )and R_(3) are all connected in parallel, the effective resistance will be