Assertion : A larger dry cell has higher emf.
Reason : The emf of a dry cell is proportional to its size.

Options

A. If both the assertion and reason are true and reason is a true explanation of the assertion.
B. If both the assertion and reason are true but the reason is not the correct explanation of assertion.
C. If the assertion and reason are false
D. If both the assertion and reason are false.

Answer

B

Explanation

(b) In order to maintain a continuous flow of charge in an electrial circuit, work has to be done. This work is done by the cell. The erenry 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 fo 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 characterstic 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.