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Q.

A reversible galvanic cell is connected to an external battery. If the EMF of the battery is less than EMF of the galvanic cell, then current

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a

Will not pass through the circuit

b

Flows from the galvanic cell into the battery

c

Flows from the battery into the galvanic cell

d

All the three may take place

answer is C.

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Detailed Solution

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If the EMF of a battery is less than the EMF of an electrochemical cell, The driving force is greater than opposing force. Then the current will flow from the electrochemical cell to the battery. As, the current always flows from a higher potential to a lower potential.

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