Consider the following statements regarding the Wheatstone bridge.
(i) For a Wheatstone bridge to be balanced, there should not be any deflection in the galvanometer.
(ii) The SI unit of sensitivity of galvanometer is radian/ampere.
(iii) All four resistances are connected with the quadrilateral battery with the key and galvanometer.
(iv) All the 4 resistances should be of different order.1
All the above are correct.
2
Only i is correct.
3
Only ii, iii & iv are correct.
4
Only i, ii, & iii are correct.