http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_s06_qp_2.pdf
The Attempt at a Solution
The answer is that C is the faulty lamp because it short circuit. But how do I know it is faulty?
Im quite sure it has something to do with the last row: open closed closed 15 ohm
Just realized it was a 1 word title :/