OCR A Level Physics Unified physics H556/03 - 16 Jun 2022 [Exam Chat]

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Was the upthrust around 6000 N

what did people get for acceleration (second question)

What did ppl get for explanation for rotation of 180

Original post by alfiecollins_

what did people get for acceleration (second question)

I got 9.97

What do you guys think grade boundaries for this paper will be? Normally it's 50 for an A do u think it'll be lower?

what about the frequency for the capacitance question?

Original post by alfiecollins_

what about the frequency for the capacitance question?

i put 25 Hz

Original post by anonymous15551

i put 25 Hz

yeah me too

Original post by tatatatata

What did ppl get for explanation for rotation of 180

i mentioned something to do with Intensity falling evey 90 degrees from max to min and something to do with polarised light

Original post by alfiecollins_

what about the frequency for the capacitance question?

I got 50hz but most ppl got 25hz

I got 50 hz for that as well

Original post by tatatatata

I got 50hz but most ppl got 25hz

you must’ve used the first square part of the graph and not used one wavelength to find one time period

what did people put for percentage uncertainty
I got about 5.6%

Original post by anonymous15551

what did people put for percentage uncertainty
I got about 5.6%

I got 9.8%

I got 11%

Original post by sxx1237

I got 50 hz for that as well

You had to see that the period was 40ms, not 20ms. so 1/T = 25 hz

Original post by anonymous15551

i mentioned something to do with Intensity falling evey 90 degrees from max to min and something to do with polarised light

Yes same, I put intensity falls from maxima to minima after 90 as it becomes horizontal polarised and D only detect vertical polarised wave. After 90 to 180 intensity increases again to maximum.

Original post by tatatatata

I got 9.8%

Did u use best value a - worst value of a / best value of a x 100

Original post by anonymous15551

Did u use best value a - worst value of a / best value of a x 100

That's what I did but I got like 21% which was percentage uncertainty in gradient which is the same as percentage uncertainty in g cause of the equation

(edited 1 year ago)

Original post by anonymous15551

Did u use best value a - worst value of a / best value of a x

(Worst fit-best fit) / best fit

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