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प्रश्न
During charging of a cell, how does terminal voltage (V) compare to EMF (ε)?
विकल्प
V = ε/2
V = ε
V > ε
V < ε
MCQ
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उत्तर
During charging, the external source must provide a voltage greater than the EMF to push current into the cell against its natural potential difference. Using \[V = ε + Ir\], the terminal voltage exceeds the EMF by the amount \[Ir\], which is the extra voltage needed to overcome internal resistance.
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