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AQA Physics Unit 1 PHYA1 20th May 2014 OFFICIAL

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For the 6 marker, did anyone else say that to measure room temp they had to plot a graph, measure pd without a water bath, then read off the graph?

Yes! I did that too. Thank god someone's got the same answer as me for something 😂

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Reply 281

CityWok

For the internal resistance q when they asked to use graph to calculate power then current did anyone do P=VI using the emf(6) as V and power which was 2W from the graph? Some people did P=I^2R

Reply 282

ThatPerson

Original post by Me123456789

For the 5 mark question what did you write about the graph temperature against voltage or voltage against temperature?

It was potential difference (voltage) against temperature, because they want to see how p.d changed with temperature.

Reply 283

you-only-live-once

Original post by JPeters

Did anybody get 0.325A for the current on the first circuit question...?

do you know how many marks we would get as theres error carried forward?

Reply 284

Ryejd

Easy paper, although the style of questions was a bit different

I^2R

Reply 285

ChordaeTendineae

Original post by JackTeh96

The last question on the 2nd question: about the forces between the protons, what do you put?

Electromagnetic?

Reply 286

Ryejd

Original post by JackTeh96

The last question on the 2nd question: about the forces between the protons, what do you put?

Electromagnetic, Virtual photon

Reply 287

deadmau_5

Original post by Razzamataz179

You just put read the voltage and then use that voltage to get a temp from your graph...

There was voltage? Dude the axis was power in WATTS against Resistance in OHMS, where did you get volts from?

Reply 288

Randomer96

Original post by JackTeh96

The last question on the 2nd question: about the forces between the protons, what do you put?

I went for electrostatic and photons.

Reply 289

CharleyJay

What did people put for the power question about when internal resistance is negligible, what would change? :s-smilie:

Reply 290

JPeters

Original post by lad123

You used P=VI 1.95/6.0, but you cant use the emf as the emf wasn't the potential difference across the resistor, as energy was lost across the internal resistor, you had to use P=I^2R

Ah, okay. Thanks.

Reply 291

Alatair97

Someone help please?! I did the resistivity question wrong then corrected it at the LAST SECOND. I put 1.1x10-7 or something... was this correct?

Reply 292

DCMed96

Original post by Ryejd

Electromagnetic, Virtual photon

I thought it is strong force?? by gluons??

Reply 293

Randomer96

Original post by CityWok

For the internal resistance q when they asked to use graph to calculate power then current did anyone do P=VI using the emf(6) as V and power which was 2W from the graph? Some people did P=I^2R

Thought it was just 0.8ohms and 1.95w and then rearragne P=I^2R?

Reply 294

team-punishment

Original post by CharleyJay

What did people put for the power question about when internal resistance is negligible, what would change? :s-smilie:

resistance would be proportional to power dissipated, i.e straight line

Reply 295

AreiMo1997

had 10 mins to do whole of electricity , ****ed it up , results day >parents get mad > cry > suicide> retake year
GGG **** YOU ELECTRICITY YOU WAAAAAANKER
Particle was ok , QUatumn was ok ( no photoelectic lololol *****) and electicity was stupid as ****

Reply 296

ozzyoscy

They really need get rid of the writing question and electricity entirely. So many people just don't get electricity, and having a random write-y question in an exam is having your cake and trying to eat it too. Either find a better way of explaining electricity in English or bump it up to uni level.

Reply 297

Razzamataz179

Original post by deadmau_5

There was voltage? Dude the axis was power in WATTS against Resistance in OHMS, where did you get volts from?

Because the experiment is to plot a graph of voltage against tempereature. So you put the circuit in a room, take a reading of the voltage, then using your graph, find the temperature.