National 5 Physics

I said it was dimmer and the work done one I got A- 0J

For the work done question I got 250000, but I wasn't sure if it was that or 125000.

which one was dimmer?

Oh ok was it dimmer because it had less resistance?

which one was dimmer?

I said because it's connected in parallel so the voltage isn't the same across? But I was really unsure so I rambled on. Lol

Lol, yeah. I felt there were far too many explain and justify question!
The frustration is real!

I know right! They were like open ended questions but without the "using your knowledge of physics"

I thought the one with the resistor was dimmer...

Yeah, really annoying...
But I think ive done well enough to get an A! Time to focus on computing for tomorrow!

The current of the bulbs was 0,5 A, it's the same at all points in the circuit, but it divides over the bulb M and the resistor. Don't forget that the bulb has an internal resistance as well! But assuming that the bulb L and M is 0,5A. Then using the formula P=I²R: P=0,025 x R (Let's assume the resistor was 100Ω for talking sake)
P=0,025 x 100=2,5W
But just looking at the formula, the higher resistance means higher power, and higher power means that the bulb is brighter. So I'm not really sure about that question ;C

I found the paper really difficult like harder than the specimen and last years. For the question with the 3 graphs and you had to say which one for the LED, what did yous say? I think I said Z and for question 1 about the bulb, I wrote it wouldn't change because they were identical bulbs.. From reading the answers here I'm guessing that's wrong??

I found the paper really difficult like harder than the specimen and last years. For the question with the 3 graphs and you had to say which one for the LED, what did yous say? I think I said Z and for question 1 about the bulb, I wrote it wouldn't change because they were identical bulbs.. From reading the answers here I'm guessing that's wrong??

Yeah, but the current splits in the parallel portion of the circuit. If the current splits, then surely the voltage over the parallel portion is less than that of the series portion, due to the split current? Does voltage even have any relevance in the brightness? Idek what im going on about right now.

the first graph was the LED one, since the diode allows the current to flow only in one direction. therefore there would be no current if the voltage would be negative ;D

Good luck!, my next one is English woohoo!

Power has relevance to the brightness, but since voltage, current and resistance have relevance to power, then everything have relevance to the brightness