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[" 100.Two cells of e.m.f.'s "E(1)" and ...

[" 100.Two cells of e.m.f.'s "E_(1)" and "E_(2)" where "E_(1)>E_(2)" ,are "],[" connected in series so as to assist each other,the balancing "],[" length is "2.7m" .When the cells are connected in series so "],[" as to oppose each other,the balancing length is found to "],[" be "0.3m" .What is the ratio of their e.m.f.'s? "],[[" (a) "1.1," (b) "1.25],[" (c) "1.5," (d) "1.6]]

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