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

MelissaW_xo
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#821
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#821
(Original post by sophiekutie)
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.. doubting myself now..
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Hannahm1995
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#822
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#822
(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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OllieGCSEs
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#823
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#823
(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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JianYang
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#824
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#824
(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
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fernmaddison
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#825
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#825
(Original post by MelissaW_xo)
Can't remember exactly but I think I got 1000Ω and 1500Ω ? What did you get?
Same
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JianYang
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#826
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#826
(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
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MelissaW_xo
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#827
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#827
(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..
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MelissaW_xo
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#828
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#828
(Original post by fernmaddison)
Same
Yay!
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leahcee
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#829
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#829
(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
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Dubai Nan Bread
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#830
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#830
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)
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Boss's
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#831
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#831
(Original post by fernmaddison)
what did people get R1 and R2 as in the circuit?
For R1 i got 500, R2=1500
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sophiekutie
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#832
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#832
(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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Umm I used r=v/I And got that?
I used the same voltages as you?
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Georgehigginson
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#833
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#833
(Original post by Boss's)
For R1 i got 500, R2=1500
This is what I got, but most people got 1000 and 1500
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JianYang
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#834
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#834
Do we have any teachers or somebody to make unofficial markscheme here?
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leahcee
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#835
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#835
I got 1500 ohms for R1 but I can't remember what I put for R2
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Kamal_Voltaic
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#836
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#836
(Original post by Georgehigginson)
This is what I got, but most people got 1000 and 1500
I got 500 and 1500 !
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JianYang
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#837
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#837
I put 500 and 1500 :-( haven't seen one person put that yet
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Gotzz
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#838
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#838
(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?
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Georgehigginson
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#839
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#839
(Original post by Kamal_Voltaic)
I got 500 and 1500 !
Ooh that makes 3 of us
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sophiekutie
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#840
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#840
(Original post by leahcee)
I got 666pence
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
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