1. Five similar lamps are connected in series to a source providing a difference of potential of 550 V. A) What is the difference of potential across each lamp? B) If the current flowing in the circuit is 1.10 A, what is the resistance of each lamp? C) What is the resistance of all five lamps? 2. R = V/I A) To find the difference of potential across each lamp, I believe you would divide the source difference of potential by 5, giving you 110 B) To find the resistance, Ohm's Law can be re-arranged, giving you R = V/I. I believe dividing the SOURCE different of potential by the given current would give you (550v / 1.10 a) = 500 ohms C) Last but not least, to find the total resistance, we would just multiply the resistance found in part B times 5 (for each lamp) giving us 2500 ohms Have I made a mistake in my thought process? If someone could confirm my attempt, it would be appreciated.