OCR Gateway Physics B - P4 P5 P6 - Unofficial Mark Scheme

OP

For question 8b) would it not be diffraction and the overlapping of waves since they did not specify which interference (destructive/constructive)?

I'm not sure about that question as a whole as it's not on the specification at all :frown:

but I looked on line and it seems to say that they need the same wavelength and the source needs to be coherent :smile:

but I need to change the answer a bit

Original post by xxKristenxx

For the p6 six marker isn't it about the fact that the LDR was positioned in the R2 position which means instead of resistance decreasing with light intensity, the resistance instead decreases when it gets darker?

Well, the resistance of LDRs increases when it gets darker, and so it would get a larger share of the input voltage (due to it being in a potential divider) I think - I don't think the property of how the resistance changes can be changed :smile:

Original post by Chittesh14

What was the question to the answer 1200 J, do you remember the exact question or information given? I'm so stupid, got confused with Belgium and gave larger population answer because I thought it said Belgium produce more electricity, idk wtf is wrong with me.

I'll add the detail to the question :smile:

Reply 121

Roberta☆

1

For the question on transformers (part b) i think) i put C,D because one was step-up transformer, not step-down
and for D i wrote that the output voltage was lower than the one in the table. Would i get any marks since i didn't write about D,E ? I can't even remember having seen an E transformer....?

Reply 122

some-student

OP

7

Original post by CandC

You literally deserve an award for doing all these unofficial mark schemes and doing them so perfectly as well 😂 Maybe next year you can do more for A level ahah

Haha thanks so much ! :smile:

Reply 123

some-student

OP

7

Original post by Roberta☆

For the question on transformers (part b) i think) i put C,D because one was step-up transformer, not step-down
and for D i wrote that the output voltage was lower than the one in the table. Would i get any marks since i didn't write about D,E ? I can't even remember having seen an E transformer....?

I think you'd definitely get the first mark, and you might get the second mark :smile:

Reply 124

some-student

OP

7

Original post by Roberta☆

For the question on transformers (part b) i think) i put C,D because one was step-up transformer, not step-down
and for D i wrote that the output voltage was lower than the one in the table. Would i get any marks since i didn't write about D,E ? I can't even remember having seen an E transformer....?

I don't think there was an E transformer, and the answer was C and D (with explanations for each to get the two marks) :smile:

Reply 125

Roberta☆

1

Original post by some-student

I think you'd definitely get the first mark, and you might get the second mark :smile:

Thank you for such a quick answer!

Reply 126

l.iqteder

1

does anyone know how much the coursework counts towards your final grade for Physics/Chemistry/Biology? Im worried since i did quite badly on this test :frown:

(edited 7 years ago)

Reply 127

some-student

OP

7

Original post by l.iqteder

does anyone know how much the coursework counts towards your final grade for Physics/Chemistry/Biology? Im worried since i did quite badly on this test :/

Well the course is split into 3 components, and the coursework: is 100 UMS (25%). This exam is 160 UMS (40%) and the first exam is 140 UMS (35%).

This link may help: http://www.ocr.org.uk/i-want-to/convert-raw-marks-to-ums :smile:

Reply 128

Gamer_44

8

Original post by l.iqteder

does anyone know how much the coursework counts towards your final grade for Physics/Chemistry/Biology? Im worried since i did quite badly on this test :frown:

25%

Reply 129

minatonin

9

Guys what do you think the grade boundaries will be for this?

Reply 130

some-student

OP

7

Original post by Jiff

Guys what do you think the grade boundaries will be for this?

Original post by GCShElpme

Just thought that I'd make some predictions regarding the grade boundaries. Feel free to leave feedback. :smile:

Predicted grade boundaries P4 P5 P6 [HIGHER] 2016The previous grade boundaries were as follows;2015- A*: 54, A: 45, B: 36, C: 272014- A*: 57, A: 48, B: 39, C: 302013- A*: 52, A: 43, B: 34, C: 25Personally, while the calculations were rather difficult and some of the questions were phrased oddly, the majority of the questions were accessible to a large group of people. My predictions for the grade boundaries are; A*: 55, A: 46, B: 36, C: 29.Hope this helps!

These are the grade boundaries that @GCShElpme predicted and I agree with these, so they will probably be like these :smile:

Reply 131

-AN-

8

Original post by some-student

These are the grade boundaries that @GCShElpme predicted and I agree with these, so they will probably be like these :smile:

Reply 132

minatonin

9

Original post by some-student

These are the grade boundaries that @GCShElpme predicted and I agree with these, so they will probably be like these :smile:

Thanks so so much! Okay I need help with one more thing. I calculated I got 55 on p123 and 42 on p456 and I got an A (I think 41/40) on my CAT.

What do you think my overall might be? :smile:

Reply 133

some-student

OP

7

Original post by Jiff

Thanks so so much! Okay I need help with one more thing. I calculated I got 55 on p123 and 42 on p456 and I got an A (I think 41/40) on my CAT.

What do you think my overall might be? :smile:

June 2014 has the highest grade boundaries, so I'll use these :smile:

P1 P2 P3: 55 raw marks would be 128/140 UMS

P4 P5 P6: 42 raw marks would be 117/160 UMS

Controlled Assessment: 41 raw marks would be 85/100 UMS

Overall it would be 128+117+85 which is 330 UMS which is an A :smile:

Reply 134

some-student

OP

7

I have decided to try and make a mark scheme for C1 C2 C3 as it is just about in my memory - but I don't think I could do B1 B2 B3.

It is here:

http://www.thestudentroom.co.uk/showthread.php?t=4181337 :smile:

Reply 135

minatonin

9

Original post by some-student

June 2014 has the highest grade boundaries, so I'll use these :smile:

P1 P2 P3: 55 raw marks would be 128/140 UMS

P4 P5 P6: 42 raw marks would be 117/160 UMS

Controlled Assessment: 41 raw marks would be 85/100 UMS

Overall it would be 128+117+85 which is 330 UMS which is an A :smile:

Ah perfect! Thank youuuu!! :smile:

Was that a high A or low?