AQA Physics Unit 1 PHYA1 20th May 2013

Are most people here doing resits or sitting this paper for the first time?

Reply 102

Original post by jazzynutter

(Our teachers give us no help whatsoever when it comes to the ISAs, we're just thrown in - which, being an exam, is technically how it should be done - but they just don't appreciate how ridiculous the grade boundaries are due to the fact that every single school other than ours cheats in them........ :mad:

)

Don't be so sure, our school doesn't cheat either and literally no-one bar maybe 3/25 got marks equivalent to an A from the last ISA boundaries, it's a bit of a piss take tbh

Reply 103

Original post by BayHarborButcher

Are most people here doing resits or sitting this paper for the first time?

I'm sitting the paper for the first time.

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Reply 104

Original post by x-Sophie-x

I'm sitting the paper for the first time.

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Aha I did the Jan 13 exam, it was really easy but I somehow cocked up and got 1 UMS of an A :frown:

Got my paper back, lost 7 marks by somehow getting the specific charge all wrong and the resistance of the circuit! Was fuming. I'm dreading unit 2 though

Reply 105

Original post by BayHarborButcher

Aha I did the Jan 13 exam, it was really easy but I somehow cocked up and got 1 UMS of an A :frown:

Got my paper back, lost 7 marks by somehow getting the specific charge all wrong and the resistance of the circuit! Was fuming. I'm dreading unit 2 though

Same, I hate mechanics so much.
The wave/optics stuff is quite nice though.

Reply 106

Kinesis

2

Does anyone know what sort of experimental examples we should know for the 6 markers on the unit 1 exam? I'm alright with the photoelectricity ones but in Jan 10 Q5b and May 09 Q5a there are two which ask you to draw circuits to test for resistivity and finding the VI characteristic for a semi-conductor diode?!
What else should I know? Are these questions just one-offs?

Reply 107

chubuking

1

any of you lot know where i can find the 2013 jan past paper unit 2 ?

(edited 10 years ago)

Reply 108

Original post by Kinesis

Does anyone know what sort of experimental examples we should know for the 6 markers on the unit 1 exam? I'm alright with the photoelectricity ones but in Jan 10 Q5b and May 09 Q5a there are two which ask you to draw circuits to test for resistivity and finding the VI characteristic for a semi-conductor diode?!
What else should I know? Are these questions just one-offs?

I think anyone to do with what components are in our syllabus? So resistors, thermistors, LDR's and semi-conductive components? The only one that hasn't been tested is an LDR, I thought that was gonna come up in Jan 13 but I think it was a semi-conductive component.

Reply 109

Original post by x-Sophie-x

Same, I hate mechanics so much.
The wave/optics stuff is quite nice though.

I do maths mechanics so I thought mechanics would be alrght, but there are still some bits that are just annoying :s-smilie:

Reply 110

Original post by BayHarborButcher

I do maths mechanics so I thought mechanics would be alrght, but there are still some bits that are just annoying :s-smilie:

I've finally gotten the hang of projectile motion, but all the other stuff is mehh. :s-smilie:

I wish our school gave us the option to study mechanics in maths, I'm doing statistics :frown:

I hate electricity as well.

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Reply 111

Original post by BayHarborButcher

I think anyone to do with what components are in our syllabus? So resistors, thermistors, LDR's and semi-conductive components? The only one that hasn't been tested is an LDR, I thought that was gonna come up in Jan 13 but I think it was a semi-conductive component.

What's a semi-conductive component? It's not a diode is it?

I dont think LEDs will come up because the ISA was based on that.

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Reply 112

Original post by x-Sophie-x

Yep, dividing by 3 and multiplying by 2 is the same thing, surely?

15/3*2=10
15/1.5=10

Someone please correct me if I'm wrong.

Could you tell me why you do that?

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Reply 113

When an electron is incident on an orbital electron can it have a higher energy than what needed as in photon absorption it has to be the exact amount, no higher or lower, is this the same for incident electrons???

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Reply 114

Original post by Jimmy20002012

When an electron is incident on an orbital electron can it have a higher energy than what needed as in photon absorption it has to be the exact amount, no higher or lower, is this the same for incident electrons???

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I think, it can be higher if the atom is ionised and the electron is ionisised as the extra energy is the kinetic energy of the emitted photoelectron. however if its just excited it has to be exact?

Not sure though.
I'd also like it if someone could clarify this?

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Reply 115

Original post by Jimmy20002012

Could you tell me why you do that?

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Because you want to find the period for one wave. The time base for one and a half waves is 15ms, so one wave is 15/3*2 which is 10ms.

So the frequency is then 100hz.

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Reply 116

Original post by x-Sophie-x

Because you want to find the period for one wave. The time base for one and a half waves is 15ms, so one wave is 15/3*2 which is 10ms.

So the frequency is then 100hz.

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Where does the 3*2 come from? :smile:

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Reply 117

Original post by Jimmy20002012

Where does the 3*2 come from? :smile:

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Because you split the wave into 3 parts and one wave consists of 2 of those parts.
You divide by 3 FIRST, then multiply by two btw. Or as you said, divide by 1.5.

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Reply 118