Answer :

1A,0A,1A,0A

Given, resistance of resistor,


emf of each cell,


A Equivalent circuits are


For current through a is


As for b, the two emf cancel each other, thus total potential is zero. Hence, the current is zero.


B Equivalent circuits are


For current through a is


Again for b, the two emf cancel each other, thus total potential is zero. Hence, the current is zero.


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