Ok, ac circuits are not in my syllabus, but I found this in an old Past Paper (of 1995), so JUST IN CASE the impossible happens, can someone please explain this to me.
A mains circuit contains six similar bulbs connected in series. One of the bulbs has a broken filament. Voltmeter X and Y of infinite resistance are placed in the circuit as shown.
What are the voltmeter readings in Volts?
A 0 0
B 0 240
C 40 40
D 240 0
Actually, it seems a bit interesting.
Turn on thread page Beta
A.C. circuit question watch
- 15-04-2008 12:52
- 15-04-2008 13:56
Its a potential divider. Most PD across most resistance. (Ac is irrelevant)
A broken filament has an infinite resistance so gets all the PD
Answer is 240v for X. 0v for Y
- 16-04-2008 12:29
Good thing I did not simply ignore it.
My teacher said that no current flows so the no voltmeter would show any reading, but you are correct, I checked the answer in a solved paper.