The figures below show battery X and battery Y connected tog

The figures below show battery X and battery Y connected together two different ways. Battery X is a 11 volts battery and battery Y is a 7 volts battery. Determine the voltage vAB for each configuration. HINT: It may help to label the wire connecting the two batteries as node \'C\'.

battery1.gif

vAB (V) =
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battery2.gif

vAB (V) =

Solution

(a)vab=11+7=18 volts

Because they are series additive.

(b) vab=11-7=4volts.

Because they are in series opposition.