AQA Physics PHYA4 - 20th June 2016 [Exam Discussion Thread]

What did people but as units for epsilon naught x Gravitational constant?

What does anyone reckon the B boundary will be. It's all I was aiming for in this paper anyway considering I always do slightly worse in exams and I doubt I'll be getting an A anyway oops

I got zero as well, they all cancelled out.

I just guessed that and I know I am wrong. I put the longest one with Fmkg nonsense. I didn't have time for this ugly question

I put C^2 / kg^2 I think

I have no idea why I did it but I said plot 'lengths against time' and the gradient would be g. Would I get any marks for the graphical method bit since I mentioned the gradient would be g?

I put the one with kg^2 in it because the electric equations don't involve mass.

Do you think that unit 5 will be harder becuase unit 4 paper is kinda decent ? Hopefullly i dont trigger anyone

likely 48ish was way easier than last years?

d b b d d c d b b c b c c a c a b a c a a d c b d

*Vietnam flashbacks intensifies*

Hi,

For the question asking for the time constant: It said it took 45 seconds for 80% of the voltage to decay. So, I did 45/80, for the time for 1 % to decay. I then said the time constant was the time for it to decay to ~ 37% ((1/e)*100) and so I did (1-1/e)*100 which roughly gave 63% as expected. I did this 63% timesd by the value of 45/80 to give 63% lost- and I got like 35.6... which is wrong. Why is this wrong?