A rectangular loop contains two ideal batteries and two identical resistors connected in series. Starting at point Q and moving clockwise, the elements are encountered in this order:
1. Battery A traversed from its positive to negative terminal
2. Resistor R1 in the direction of conventional current
3. Battery B traversed from its negative to positive terminal
4. Resistor R2 opposite to the direction of conventional current
Which list gives the correct signs (in the order encountered) of the four potential differences that must be summed to satisfy the loop rule?
a) −EA,+IR,+EB,−IR
b) −EA,−IR,+EB,+IR
c) +EA,−IR,−EB,+IR
d) −EA,−IR,+EB,−IR