Kgriffin13
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#1161
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#1161
What do you think is likely to come up in long answer questions?


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Mohid Khan
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#1162
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#1162
can some one post unofficial markscheme and section a plz
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user1-4
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#1163
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#1163
hardest a level ever!
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username972634
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#1164
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#1164
What do you think is likely to come up in long answer questions?
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Lukerobbo
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#1165
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#1165
Has anyone got some good revision questions for this unit would be greatly appreciated
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sheepshap
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#1166
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#1166
How do u guys go about answering the written questions to get full 4/4 or 6/6?
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abdcefghi
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#1167
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#1167
Can someone help me out with Q10 and Q24 on the multi choice june 2012 it'd be much appreciated thanks

http://filestore.aqa.org.uk/subjects...1-QP-JUN12.PDF
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Cheesegrater4
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#1168
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#1168
this unit is so hard
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user1-4
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#1169
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#1169
(Original post by abdcefghi)
Can someone help me out with Q10 and Q24 on the multi choice june 2012 it'd be much appreciated thanks

http://filestore.aqa.org.uk/subjects...1-QP-JUN12.PDF
tried and couldnt do...
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username972634
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#1170
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#1170
(Original post by abdcefghi)
Can someone help me out with Q10 and Q24 on the multi choice june 2012 it'd be much appreciated thanks

http://filestore.aqa.org.uk/subjects...1-QP-JUN12.PDF
Q10) Without damping as the driving force approaches the resonant frequency the amplitude tends to infinity. However the more heavy the damping then a lower amplitude is reached. Graphs A and C clearly have the wrong shape as the amplitude decreases when nearing the resonant frequency. And the reduction in the amplitude of B is less than in D. So the damping in D is heavy and the damping in B is light.
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Cheesegrater4
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#1171
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#1171
(Original post by user1-4)
tried and couldnt do...
lol
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username972634
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#1172
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#1172
Hi. Just wondering if anyone could offer an explanation for the following:

In the AQA Nelson Thorne's textbook it says that the phase difference between the displacement and the driving force increases from 0 to π/2 at resonance. And the phase difference between the velocity and driving force is π.

Also do we have to know how to calculate the effective spring constant in series/parallel for PHYA4 as I see no mention of it in the textbook and yet I'm pretty sure that we've done it in class. Thanks.

Also: Anyone have any lucky guesses as to what will come up in the long answer questions. I reckon it's going to be a cruel experimental type capacitor question.
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user1-4
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#1173
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#1173
(Original post by mastermdc)
Also do we have to know how to calculate the effective spring constant in series/parallel for PHYA4 as I see no mention of it in the textbook and yet I'm pretty sure that we've done it in class. Thanks.

Also: Anyone have any lucky guesses as to what will come up in the long answer questions. I reckon it's going to be a cruel experimental type capacitor question.
we have done spring constants.
Unit 2 bruv

dunno bout long q's??? Doubt capacitors though. experiments were all AS stuff
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