The terminal potential difference of a cell when open-circuited is
Correct answer: A. E
- A. E
- B. E/2
- C. zero
- D. infinity
Explanation
When a cell is open-circuited (no external load connected), the terminal potential difference is equal to the electromotive force (EMF) of the cell (E). This is because no current flows through the cell, so there is no voltage drop across its internal resistance.Incorrect options: (b) E/2 - This would only be the case if the cell was arranged in a specific circuit configuration.(c) When a cell is open-circuited, there is still an EMF present, so the potential difference is not zero.(d) Infinity - This is not physically possible in the context of electrical circuits.
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