The terminal potential difference of a cell when short-circuited is: (E = E.M.F. of the cell)
Correct answer: C. Zero
- A. E
- B. E/2
- C. Zero
- D. E/3
Explanation
The correct option is: c) Zero. When a cell is short-circuited, the current flows with minimum resistance directly between its terminals, and the potential difference across the cell becomes zero. The entire EMF is used to overcome the internal resistance of the cell, resulting in no potential difference available across the terminals.
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Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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