THE TWO-INDEX NOTATION FOR VOLTAGES
INSTEAD OF SHOWING THE REFERENCE POLARITY
WE AGREE THAT THE FIRST SUBINDEX DENOTES
THE POINT WITH POSITIVE REFERENCE POLARITY
WHAT ENERGY IS REQUIRED TO MOVE 120[C] FROM
POINT B TO POINT A IN THE CIRCUIT?
THE CHARGES MOVE TO A POINT WITH HIGHER
VOLTAGE -THEY GAINED (OR ABSORBED) ENERGY
WHICH POINT HAS THE
HIGHER VOLTAGE?
THE VOLTAGE
DIFFERENCE
IS 5V
