Batteries in Series with Reversed Polarity · CAP 2012 #5
Physics · electromagnetism
Problem
Three batteries are placed in series. Each battery has an internal resistance r. If one of the batteries is placed the wrong way around as shown in the picture, what will be the total resistance of the three cells now?
a) r/3
b) r/2
c) r
d) 2r
e) 3r