OCR Physics Unit 2 - G482 - (June Exams Preparation)

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Am I the only person that actually LIKED this exam? :confused:

that makes me think I missed some really obvious stuff!

I thought that! During the paper I didn't think it was too bad then everyone in my school said how dreadful and hard it was.. :frown:

doubting myself now..

Reply 821

Hannahm1995

Original post by MelissaW_xo

Can't remember exactly but I think I got 1000Ω and 1500Ω ? What did you get?

Oh bum bum bum poo aha! I got 1500 and 4500 :'(

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Reply 822

OllieGCSEs

Original post by sophiekutie

1500 and 3000

I got 1000 and 1500 which worked because I put them into the potential divider equation and it spat out 30V and 15V (which matched the circuit)

Original post by JianYang

I got cost of charging to around 13p. I originally got 655 or something but then thought, would it really cost £6.50 to charge something for 7hours? Sounds unreal. I just hope it's around 13p

You think £6:50 sounds less realistic than 13p when the cost of 1kW was 26p?...

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Reply 823

JianYang

Original post by sophiekutie

I also thought this... But then is it a big battery for quite a long time so I thought what the hey, I may as well go for it?

You might be right! But was confused in exam to get such a big number

Reply 824

fernmaddison

Original post by MelissaW_xo

Can't remember exactly but I think I got 1000Ω and 1500Ω ? What did you get?

Same

Reply 825

JianYang

Original post by OllieGCSEs

I got 1000 and 1500 which worked because I put them into the potential divider equation and it spat out 30V and 15V (which matched the circuit)

You think £6:50 sounds less realistic than 13p when the cost of 1kW was 26p?...

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Ah now it sounds ridiculous :/ wrote in answer and crossed it out

Reply 826

MelissaW_xo

Original post by Hannahm1995

Oh bum bum bum poo aha! I got 1500 and 4500 :'(

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No I may be wrong! Don't trust me! At least we both got 1500Ω which is a good sign.. :smile:

Reply 827

MelissaW_xo

Original post by fernmaddison

Same

Yay!

Reply 828

leahcee

Original post by sophiekutie

Yay!!

in that case...
How much did you get as the cost of the battery? I think I got like £6.something?!

I got 666pence :colondollar:

Reply 829

Dubai Nan Bread

Ok for the question on the amplitude recieved at R when its moved 0.75cm to a transmiiter did anyone put something like this:

So if it moved 0.75cm towards one then one wave must travel 1.5cm further than the other. This is half a wavelength so the phase difference is 180* which will result in destructive interference so minimum displacement (node)

Reply 830

Boss's

Original post by fernmaddison

what did people get R1 and R2 as in the circuit?

For R1 i got 500, R2=1500

Reply 831

sophiekutie

Original post by OllieGCSEs

Umm I used r=v/I And got that?
I used the same voltages as you?

Reply 832

Georgehigginson

Original post by Boss's

For R1 i got 500, R2=1500

This is what I got, but most people got 1000 and 1500

Reply 833

leahcee

I got 1500 ohms for R1 but I can't remember what I put for R2 :s-smilie:

Reply 834

JianYang

Do we have any teachers or somebody to make unofficial markscheme here?

Reply 835

Kamal_Voltaic

Original post by Georgehigginson

This is what I got, but most people got 1000 and 1500

I got 500 and 1500 !

Reply 836

JianYang

I put 500 and 1500 :-( haven't seen one person put that yet

Reply 837

Gotzz

Original post by sophiekutie

Cool!

it just seemed a little big to me!
Also, how did you draw the diagram for that question?
I just drew the same as what they drew but with the pos and neg reversed in the circuit?

Sorry, what diagram?

Reply 838

Georgehigginson

Original post by Kamal_Voltaic

I got 500 and 1500 !

Ooh that makes 3 of us

Reply 839

sophiekutie

Original post by leahcee

I got 666pence :colondollar:

Lol I can't remember exactly? I think it was 3600 (power used)
Divided by 1000 as it was in watts not kilowatts
Then multiplied by the 7 hours
When multiplied by the cost per kwh in pence

Tbh I think all the answers will wary depending on wether people used the rounded values suggested in the show that questions, or used their original (more accurate) values. I think either way you should get the mark, providing your calculations were okay :smile: