A) a metre bridge can be used to determine the emf of a primary cell
B) a metre bridge works on the principle of Wheatstone bridge
C) a potentiometer is used to compare the emfs of two primary cells
D) a millimeter can be used as an ohmmeter
Correct Answer: A
Solution :A metre bridge is used to determine the resistance of a given wire and not to determine the emfofa cell.
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