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Four cells, each of e.m.f 1.5 V, are con...

Four cells, each of e.m.f 1.5 V, are connected in series to form a battery. Find the e.m.f of the bettery.

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when four cells are connected in series the e.m.f of the baytery
`E= E_1 + E_2 +E_3 +E_4 =1.5+1.5 +1.5+1.5 = 6 V`
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