Rankers Physics

Combination of Batteries: Practice Problem & Solution

The terminal potential difference of a cell is greater than its emf when: (1998)
A battery of less emf is connected in its series
A battery of higher emf is connected in its series
A battery of higher emf is connected in its parallel
A battery of less emf is connected in its parallel

Solution Explained:

To solve this problem, we apply the core principles of Combination of Batteries. Understanding the underlying formula is key to arriving at the correct answer below:

Terminal potential difference exceeds emf ($V > E$) only when the cell is being charged. This occurs when a battery of higher emf is connected in series (opposing) to drive current into the positive terminal of the cell.

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