Originally posted by eagle:Take it as either different circuits, or parallel circuits.
Either way, the power will be V²/R because it is easier to determine the voltage, which means that the answer is B
If it is the bulbs are connected to the mains and are for usuage, it doesn't really make much sense to connect light bulbs in series. If one bulb fused, the other bulb wouldn't light up. This is the reason why electrical applicances in our home are connected in parallel.
let's not go so deep...
for the best comparison, different ciruits, same set up.
which is the best situation to compare the brightness of each bulb seperately.
It's not deep. It's O level knowledge about parallel circuits.
Originally posted by eagle:Take it as either different circuits, or parallel circuits.
Either way, the power will be V²/R because it is easier to determine the voltage, which means that the answer is B
If it is the bulbs are connected to the mains and are for usuage, it doesn't really make much sense to connect light bulbs in series. If one bulb fused, the other bulb wouldn't light up. This is the reason why electrical applicances in our home are connected in parallel.
good reasoning
btw i am sec 4
having the paper next mon
1st question B
2nd question A
Originally posted by skythewood:i see, so what has that got to do with the question? is noting the brightness of the circuit a hard thing to do, and something that needs to be assumed? can't you just look at the bulb and say hey, it's less bright than that one?
Yeah in real life you can. But for explanation, think should calculate amount of current all these to accurately determine.