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AQA Physics Unit 1 PHYA1 20th May 2013

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Reply 900

Ephixa

I hated that last question. And threshold frequency part from that a good exam :smile:

Reply 901

ShutUpLegs

What happens when intensity's constant and frequency decreases? I put rate of emission decreases until fmin.

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Reply 902

username1099191

How many similarities between hadrons and leptons were we supposed to come up with?

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Reply 903

Ephixa

Original post by jazzynutter

How many similarities between hadrons and leptons were we supposed to come up with?

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They meant between baryons and mesons I think :P

Reply 904

SwndonTwn

I reckon I may have finally broken 3 marks on the 6 marker, made a stupid mistake on the first question calculating specific charge. I think grade boundaries will be high

Reply 905

123456789012

Did anyone get 30000 ohms for the last question?

Reply 906

FrankB3

Original post by Ephixa

They meant between baryons and mesons I think :P

Nah mate, they meant between Leptons and Hadrons, as far as I could tell. I wrote the differences between both of them anyway. But I think they meant leptons and hadrons.

Reply 907

TheBeesKnees

Original post by 123456789012

Did anyone get 30000 ohms for the last question?

yes I did! Thought this paper was quite nice, but anticipating grade boundaries to be really high :frown:

I wanted a 6 marker on an experiment! But oh well, at least its done now!

Reply 908

Maloneyyy

What did everyone do for the specific charge on the first question? and what did everyone get for the very last? I got 30000ohms

Reply 909

Son234

Last question

V (output) = (R1/ R1+R2+R3) X V(source)

0.75 = (5/ 5+R2+5) X 6

Rearrange R2=30kohms

R2--> variable resistor resistance

Answer: 30,000ohms

:biggrin:

so happy

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Reply 910

Felix Ivers

Original post by 123456789012

Did anyone get 30000 ohms for the last question?

Yessssss

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Reply 911

Jimmy20002012

Original post by Son234

Last question

V (output) = (R1/ R1+R2+R3) X V(source)

0.75 = (5/ 5+R2+5) X 6

Rearrange R2=30kohms

R2--> variable resistor resistance

Answer: 30,000ohms

:biggrin:

so happy

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Would I get 2 marks for getting 30ohms as i didnt do 10^3

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Reply 912

TheBeesKnees

Original post by Maloneyyy

What did everyone do for the specific charge on the first question? and what did everyone get for the very last? I got 30000ohms

I did the specific charge of the entire ion, thus including the mass of the electrons, and I also got 30k ohms!

Reply 913

Felix Ivers

Does anyone usually put an unofficial mark scheme up for physics?

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Reply 914

Son234

The similarity they wanted for leptons and HADRONS

Is that leptons and HADRONS can interact together by the WEAK interaction

Eg proton+electron capture

That was the similarity :smile:

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Reply 915

Maloneyyy

Original post by TheBeesKnees

I did the specific charge of the entire ion, thus including the mass of the electrons, and I also got 30k ohms!

So you did 18 electrons and 20 protons x the charge of the electron? nice!

Reply 916

Notorious544d

OMG I loved that 6 marker! Overall I found the paper nice whilst others found it fairly hard. Not sure what the boundaries are gonna be, but I'm hoping its low to boost my UMS up :smile:

Reply 917

Son234

Original post by Jimmy20002012