AQA PHYA4 ~ 13th June 2013 ~ A2 Physics

Probably said the sattelite was near the earths surface

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

1500?

Probably said the sattelite was near the earths surface

oh yeah, for the induced emf graph, everyone started off at zero, right?

but did you draw it sloping up (to the positive part of the y-axis) in the first quarter of a cycle?

section a: kgms-2, t root2 energy one i got 2E? ...

1a)define shm:
acceleration is proportinal to displacement, and acceleration acts toward equilibrium (2)
b)acceleration of pendulum = 0.503 3s.f (3)
c)frequency= 1500 revs per minute (2)
d) time for oscilations to be in phase again = 38 (3)

2) voltage = 30,000 (1)
b) (3)
c) time taken for discharge will increase because time constant increases (2)
d) flash is brighter because more energy stored (2)

3) 6 marker on fields?

4) 2 conditions when no force is exerted on the partcle (2)
field is parallel to velocity
particle is stationary
b)
c)time taken for partile to go through 1 dee
d)show the time taken is independent of radius = 2pim/bq (3)
kinetic energy im MEV = 2.44 (3)

angle for max emf = (2)
gradient of graph = emf (1)

drawing a graph (2)
peak voltage (3)
calculate flux density = 0.26 (2)

Yh thats what I got. Then what are people talking about in the first q saying they got 1500 in q1?

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For satellite P and Q, P had a greater KE but lower PE so answer was C?

I did this but it's wrong, it should've been sloping down to start with (minus sine)

Positive sine curve yeah? Last

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Oh lol someone mixed it up for the list of Qs posted..

The freq for the 3 marker on Q1 was 0.503 guys the acceleration was -0.4 ish!

Not 1500 lol that was for the last q

Theres me thinking I lost 6 marks.
I got 0.503 too. Thats 3sf right?

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you sure? why?

I think it would be brighter because there is more energy stored?

shouldn't it be -sinx?