Calculate the number of dry cells, each of emf 2V and internal resist – McqOptions

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1.	Calculate the number of dry cells, each of emf 2V and internal resistance 1V that is joined in series with a resistance of 30 ohms so that a current of 0.8A passes through it.
A.	20
B.	10
C.	30
D.	40
Answer» B. 10

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