Physics Unit 2. How was it ???!!!

[mohamad yassine]

For me yes it was corroded because the distance was 1.5cm instead of 4cm... let's hope I got that right at least

yup i also got that

 

[OnindoFerdousAyon]

It was mostly easy for me except for the last question where I assumed that when one bulb was removed, the place where it was removed is still connected so I made the current in parallel and my argument was that in parallel resistance is less so each bulb gets enough current to operate whereas when each one is connected alone in series the resistance is more so they don't get enough to operate, which I think is the wrong answer but still a valid argument isn't it? They didn't specify that when a bulb is removed whether or not the connecting leads are connected back again or left separated so that's what caught me out... but other than that it was pretty alright!

beliv me, i did the exact same thing. wrote the exact same explanation.......what do u think, will we get ECF or how much mark wud we lose altogether here?

 

[jtbteddy]

was the circuit in series or in parallel?

 

[Ayesha B]

btw last multiple choice i choosed polarization although some said super-position not sure

i chose superposition but apparently I got everything wrong

 

[Ayesha B]

woaaah there the highest it ever been was 56 for unit 2 its usually pretty low

thank God! It better be that this time around too!

 

[Ayesha B]

was the circuit in series or in parallel?

series

 

[souna ali]

series

the current for both lamps was different and in a series circuit the current is the same, one was 0.17A and the other lamp was 0.2A so i think the circuit is in parallal, well thats what i did

 

[souna ali]

the best question was the 5 mark graph question who agrees??

 

[souna ali]

i chose superposition but apparently I got everything wrong

i put polarisation

 

[Choco<3]

ya im thinking 59-61

Hey..i checked for june 2012 grade boundaries unit 2 they're 66 for every exam.i dont get it? How are u people saying tht its gonna be 54-60 for an A??

 

[Hamzeh S]

Hey..i checked for june 2012 grade boundaries unit 2 they're 66 for every exam.i dont get it? How are u people saying tht its gonna be 54-60 for an A??

51
there u go
http://www.edexcel.com/iwantto/Documents/1206 GCE Units Grade Boundaries (Home - Int) corrected.pdf

 

[Hamzeh S]

the best question was the 5 mark graph question who agrees??

i drew the graph and said y intercept equal to the E.m.f since current=zero and the gradient is the negative value of R so we multiply it by -1 to get the R i think i missed something

 

[Choco<3]

51
there u go
http://www.edexcel.com/iwantto/Documents/1206 GCE Units Grade Boundaries (Home - Int) corrected.pdf

JazakAllah. and what about the total As and A2 marks?? For an A grade?

 

[Hamzeh S]

JazakAllah. and what about the total As and A2 marks?? For an A grade?

u need to get 480/600 in all 6 modules UMS not raw

 

[Choco<3]

u need to get 480/600 in all 6 modules UMS not raw

Wht is the difference between ums and raw? i dnt know anything about it.

 

[Hamzeh S]

Wht is the difference between ums and raw? i dnt know anything about it.

ums is the grade u get out of 120
raw is the mark on the paper out of 80
to get 96 ums marks aka A
u need different amount of raw marks each year which varies according to student preformance

 

[Choco<3]

ums is the grade u get out of 120
raw is the mark on the paper out of 80
to get 96 ums marks aka A
u need different amount of raw marks each year which varies according to student preformance

I didnt get the last part."u need different amount of raw marks each year ...." ??? U mean after reappearing.i dont get it.

 

[ALevel96]

Nope it doesn't. Sorry

Are you actually retarded? Just accept the correct physics.

When the length was doubled and the cross sectional are was doubled okay. If the length is doubled there is twice the amount of charge carriers! Therefore I=nAvQ compared to new I=2n2AvQ therefore v is V/4

 

[Hamzeh S]

Are you actually retarded? Just accept the correct physics.

When the length was doubled and the cross sectional are was doubled okay. If the length is doubled there is twice the amount of charge carriers! Therefore I=nAvQ compared to new I=2n2AvQ therefore v is V/4

dude chill
charge density is a measure of electric charge per unit volume of space
therefore increasing the length wont affect it charge density depends on material
so v/2

 

[Hamzeh S]

I didnt get the last part."u need different amount of raw marks each year ...." ??? U mean after reappearing.i dont get it.

each year the raw marks needed to get an A , B , C depends on student preformance im talking about grade boundaries