If you connect two identical storage batteries together in p

If you connect two identical storage batteries together in parallel, and place them in a circuit, the combination will provide A) half the voltage and twice the total charge that one battery would. B) half the voltage and half the total charge that one battery would. C) twice the voltage and twice the total charge that one battery would. D) the same voltage and twice the total charge that one battery would. E) twice the voltage and the same total charge that one battery would.

Solution

D) the same voltage and twice the total charge that one battery would.

Assuming the batteries are identical and there is no charging and discharging between the batteries themselves then the emf E of the parallel combination is the same as the emf of either of the two batteries. However, the internal resistances of the batteries being in parallel combination result in a smaller internal resistance therefore the current provided by the parallel combination is twice as much as that provided by a single battery. More current means more charge so the two batteries will provide twice as much charge as a single one.