If a bus has a 24-volt starter motor and two 12-volt batteries, how must they be connected to each other to supply the right voltage?

Question

DentroTest · Accepted Answer

To reach a voltage of 24 volts from two 12-volt batteries, a series connection is needed. In a series circuit, the positive (+) terminal of the first battery is joined to the negative (-) terminal of the second battery, thus adding their voltages (12 V 12 V = 24 V) while keeping the same capacity (Ah). By contrast, joining like poles (positive to positive or negative to negative) is a parallel connection, which would keep the voltage at 12 V and double the capacity, which is insufficient to operate a 24 V starter motor.

If a bus has a 24-volt starter motor and two 12-volt batteries, how must they be connected to each other to supply the right voltage?

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