Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: A larger dry cell has higher emf. Reason: The emf of a dry cell is proportional to its size.A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true but reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
Correct Answer: D
Solution :
In order to maintain a continuous flow of charge, in an electrical circuit, work has to be done. This work is done by the cell. The energy liberated in the chemical reactions taking place in the cells maintains the flow of charge in the circuit. Thus, the cell converts the chemical energy of its electrodes and the electrolyte into the electrical energy. The energy given by the cell in the flow of unit charge in the whole circuit is called the emf of the cell. The emf is a characteristic of the cell which depends upon the nature of the plates and the electrolyte used in cell. Hence, the emf does not depend upon the size of the cell.
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