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AQA PHYA4 ~ 13th June 2013 ~ A2 Physics

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Reply 640

LauraCompton

Original post by fizzbizz

The moon is pea size compared to the Sun, surely the sun would give a larger force?

Yes, but the sun is a much larger distance from the satellite in the question than the moon is

Reply 641

shewhomustnotbnamd

Original post by bean595

I got more than 0.26 amps as if it was less the efficiency would be greater than 100%

agreed!

Reply 642

TeddyBasherz

Original post by bean595

I got more than 0.26 amps as if it was less the efficiency would be greater than 100%

I put more than too

Reply 643

MSI_10

No one could have predicted that 6 marker

Original post by fizzbizz

3.6 I think I got for that

Erm the lowest answer, ie A was 13MJ..

I put 25MJ lol, random estimate :\

Was the tension on the bob thing 24N??

Reply 644

bean595

For the multi choice with the rod and the magnetic field to the right did people get, the movement was vertical and emf induced = blv

Reply 645

shewhomustnotbnamd

Original post by MSI_10

No one could have predicted that 6 marker

Erm the lowest answer, ie A was 13MJ..

I put 25MJ lol, random estimate :\

Was the tension on the bob thing 24N??

i said 24

Reply 646

Jack93o

for that capacitor question asking about what would happen to the sparks for a higher capacitance, what did you guys put?

Reply 647

oli_G

Original post by fizzbizz

What did people get for the final transformers multiple choice question? 460 turns and less than 0.26A?

I got more than 0.26 as

\frac{V_sI_s}{V_pI_P} < 1

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Reply 648

Asvp

Original post by saba146

did you get something to the power x10-8?

7x10-8 I got, and 8.7 something for the one before

Reply 649

gandanmo

surely for question 5 the answer was 150 degrees! not 60!

Reply 650

fizzbizz

12000Ns (B) for question 2 about momentum?

Reply 651

MSI_10

Did anyone get 1500 revs per minute for freq? And the graph of emf was a sine wave?

Also, since it was a SEMI circle did we have to use circumference as PI/R instead of 2PI/R? I got 6.8X10^-8 seconds?

Reply 652

TeddyBasherz

Original post by gandanmo

surely for question 5 the answer was 150 degrees! not 60!

I put this, then pi/3 radians, for some reason :/

Reply 653

bean595

Original post by gandanmo

surely for question 5 the answer was 150 degrees! not 60!

I got this but it appears not lol

Reply 654

MSI_10

Original post by shewhomustnotbnamd

i said 24

Yesss changed it just in time from C :biggrin:

Reply 655

Jack93o

I smashed every section A past paper, dropping not more than 2 marks

but I think I've dropped at least 3 already, that earth, sun, moon and the vertical rod question were a mind****