In which of the above cells, the potential difference between the t...

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In which of the above cells, the potential difference between the terminals of a cell exceeds its emf.
\( \mathrm{P} \)
W
(a) ..
(b)
(No current)
(d)
(c)
(A) a
(B) \( \mathrm{b} \)
(C) \( \mathrm{c} \)
(D) \( \mathrm{d} \)
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