CCEA A2 Physics Practical Exam 5th May 2016

nirishmedic

Anyone else doing this exam on Thursday?
What are your predictions and how are you preparing?

Reply 1

rachael_nc

Yes I'm doing it tomorrow! I'm hoping its on oscillations and electrical circuit but I have no clue for question 3 😦

Reply 2

nirishmedic

Original post by rachael_nc

Yes I'm doing it tomorrow! I'm hoping its on oscillations and electrical circuit but I have no clue for question 3 😦

Lenses and capacitors haven't come up for a while!
Good luck!

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Reply 3

yash.b97

Who's done the electrical circuit task? I need help

Reply 4

nirishmedic

Thoughts on today?

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Reply 5

kitkat1498

Overall not too bad.. was a little unsure of the uncertainty question for the electrical circuit q though

Reply 6

kitkat1498

What range did you get for values of Ln0, and uncertainty?

Reply 7

nhealy1

Original post by kitkat1498

Exp 1 - measuring the angle between two suspended spings attatched to a mass, and the length of each as the masses increased.
Exp 2 - LDR - measuring the current, when placing a glass plate on top of the LDR (under a light source) until 5 glass plates were on top.
Lots of uncertainty questions.
3. 9 mark planning and design (ball bearing in a bowl - oscillations)

what sort of questions come up in the part 3 planning and design,, anything hard we need to be made aware of.... the part 3 is always a struggle for me

Reply 8

mike_gawa

Does anyone know that is doing this exam tomorrow do CCEA change the conntet much of this exam or is it the exact same as the one today?

Reply 9

Jaccckkk

Original post by kitkat1498

Overall not too bad.. was a little unsure of the uncertainty question for the electrical circuit q though

19.61mA and +-0.27mA, what did you get?

Reply 10

skye_eve

How did everyone find the a21 exam today?

Reply 11

kitkat1498

I didn't like the circular motion question. What points did you choose as most and least? And what did you get the nuclear density to be? Does anyone have a rough mark scheme?

Original post by skye_eve

How did everyone find the a21 exam today?

Reply 12

jackpcraig

Original post by kitkat1498

I didn't like the circular motion question. What points did you choose as most and least? And what did you get the nuclear density to be? Does anyone have a rough mark scheme?

I didn't like the circular motion either. The nuclear density is 2.3*10^17

Reply 13

skye_eve

Circular motion was horrible. I put B for most and A for least what about everyone else?

Reply 14

kitkat1498

I thought the momentum question was fairly easy. Can't remember them all (feel free to fill in the gaps)
1)momentum of the 120kg rugby player
-P=MV =(120)(28.8×10^3÷3600)
2)final v =3.45
3) with second player, stopping force doubles, hence V is halved?
Circular motion question
-Really not sure here to be honest. Said that max deformation occured at C (bottom point) and minimum at B? (Although I think now that it was A).
Simple Harmonic - a=w^2x, where w=2pi/T
A at fixed point =0
(Can't remember next one)
Nuclear density - 3m/4 pi Ro^3 using data given in question. For some reason I got it to be 4.5 or something.
Speed of the neutron anybody?
Mass defect worked out to give 28.8 MeV I think.
E=MC^2 where E=energy, mass defect, and light in a vccuum.
Basic description of boyle's law experiment.
For the tyre question, P1/T1 =P2/T2, got secondary pressure to be 1059Kpa I think.
Basic description of protactinium expt with GM tube.
Angular velocity of the gymnast?
For the alpha decay, subtracted 4 from mass number and 2 from atomic number to calculate 75 proton and 80-something neutrons. DT reaction stuff was good I thought. JET fusion question?