Four identical cells of emf \( E \) and internal resistance \( r \) are to be connected in serie... VIDEO
Four identical cells of emf \( E \) and internal resistance \( r \) are to be connected in series. Suppose if one of the cell is connected wrongly, the equivalent emf and effective internal resistance of the combination is
[KCET 2015]
(a) \( 4 E \) and \( 2 r \)
(b) \( 2 E \) and \( 2 r \)
(c) \( 4 E \) and \( 4 r \)
(d) \( 2 E \) and \( 4 r \)
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