AQA Physics Unit 1 PHYA1 20th May 2014 OFFICIAL Watch

lad123
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#261
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#261
(Original post by RowanChat32)
R was in the circuit to act as a potential divider, otherwise the pd across the thermistor would always equal the output voltage
Thats some sweaty **** right there, that was probably only 1 or 2 marks hopefully, was the water bath the correct way though?
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deadmau_5
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#262
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#262
(Original post by butterfly14567)
I thought if you increase temperature you increase resistance because the positive ions have more energy so it's more difficult for charge carriers to get through
Thats for a Postive Temperature Coefficient component like a wire. This is for a Thermistor with an NTC
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SellersOHR
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#263
(Original post by Lew Breo)
guysssssss get snapchat talk on there or something
Suck a fat one son
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nerdynatalie
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#264
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#264
(Original post by Miso77)
I put neutron too! Charge conserved I explained! And I used p=I^2V for the electricity question but I had no idea if I was doing it correctly!

A neutron wouldn't conserve the baryon number though
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deadmau_5
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#265
(Original post by _Caz_)
I used the piece of crap they gave us :L
Well ****. I used the crap they gave us too but added you could always add an Ammeter and thermometer to measure the temperature.
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i9l7f
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#266
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#266
(Original post by simon105)
Particle physics, perfect, quantum, perfect, electricity, AWFUL
I'm glad I'm not the only one who thought this 😩


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nerdynatalie
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#267
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#267
I said that you should put the thermistor in the fridge, what the hell was I thinking?!
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TheRAG
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#268
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#268
For the question where we had to tick a box, do any of you think more than one of them could have been correct?
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butterfly14567
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#269
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#269
(Original post by i9l7f)
What did people put for the question on strong nuclear force? How it changes as you pull 2 nucleons apart or something I can't remember exact wording :P


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Below 3-4fm keeps them together.
Below 0.5fm keeps them apart
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Razzamataz179
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#270
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#270
(Original post by deadmau_5)
Yea i got that too but what a ****ing **** peice of ass paper that was! No photoelectricity which is an interesting topic and is easy marks, instead they fill it in with that mofo electricity question. I mean no one gives a ****, last year the paper was PISS EASY, this year we are given one big pile of ****. I was so confused on that question, i literally left it till the end and then filled it with whatever i could pull out of my ass.

I mean why the **** would you give something we haven't encountered before! Then questions RELATED TO IT, GODDAMN YOU AQA!

For the last question part a) did we have to build our own circuit and include an Ammeter, thermometer or did we just have to use the **** they gave us?
You just put read the voltage and then use that voltage to get a temp from your graph...
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JPeters
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#271
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#271
Did anybody get 0.325A for the current on the first circuit question...?
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Miso77
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#272
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#272
(Original post by i9l7f)
What did people put for the question on strong nuclear force? How it changes as you pull 2 nucleons apart or something I can't remember exact wording :P


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I put repulsive then attractive
Short range
Range from 0.1-1fm. (Anything range below 10fm was completely suitable)
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RowanChat32
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#273
(Original post by lad123)
Thats some sweaty **** right there, that was probably only 1 or 2 marks hopefully, was the water bath the correct way though?
haha, yeah the water bath is the way to go
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nerdynatalie
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#274
(Original post by JPeters)
Did anybody get 0.325A for the current on the first circuit question...?
I did!! But I think it's wrong
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TheRAG
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#275
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#275
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?
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Zij
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#276
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(Original post by lad123)
How did everyone vary the temperature of the thermistor on the 6 markers, with a water bath and thermometer? and why was R in the circuit, was it to lower current so the circuit doesn't get hot and change the results?
I said that they should use ice and a bunsun burner with a water bath to control the temp. I also said they R resistor was there to act as a potential divided, without it the voltage across the resistor will say the same, equal to emf.
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CityWok
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#277
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#277
Nah its less than 0.5fm repulse and 0.5-3fm attract. 3fm or more will have no affect.
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lad123
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(Original post by JPeters)
Did anybody get 0.325A for the current on the first circuit question...?
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
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Razzamataz179
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#279
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#279
(Original post by Kieranw5)
I gt 1200m/s for the muon question about it's speed
5eV for the energy one in eV on fluroscent lamps
3.1 internal resistance
5.5x10^-7 ohm metre for resistivity
I got 1.1x10^-7 for resistivity
P=RA/L
A = pi(1*10^-3)^2/4
P = { [pi(1*10^-3)^2/4] * 0.7 } / 4.6 (or w/e L was)
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DCMed96
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#280
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#280
The last question on the 2nd question: about the forces between the protons, what do you put?
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