Question

In which of the following cells, the potential difference between the terminals of a cell exceeds its emf.

• A. $a$
• B. $b$
• C. $c$
• D. $d$

Answer 1

The correct option is B $b$

In cell (b), charging is in process as current is entering through positive terminal which happens only while charging . And hence,in this case. terminal voltage will be greater than the emf of the cell.

Terminal voltage is $E+ir$ which is greater than $E$ in case -(b).

Answer-(B)