Edexcel A Level Physics Paper 1: Advanced Physics I 9PH0 01 - 24 May 2023 [Exam Chat]

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Reply 80

enrdegttve23

Original post by fergus.n.c

No it was series I’m fairly sure - what did people get for the moments question?

Good haha-I spent a few mins thinking about if it was in parallel but good

Reply 81

faisal_345

Equated the moment if Tension in y to wight

Reply 82

fergus.n.c

Original post by Warren Fernandes

It was in parallel but since its resistance is infinite the total R in that combination is still the R of the resistor. Aka the transistor doesn't affect it

Oh yes I thought you meant the resistor being in series with ldr

Reply 83

Amin9127

Original post by faisal_345

What did you write in part B,does it heat faster when the frequency increases

I waffled about it being at peak current for a longer time so heats quicker idk

Reply 84

Warren Fernandes

Original post by Amin9127

I waffled about it being at peak current for a longer time so heats quicker idk

Thought a higher f would meam it would alternate faster so rate of change of mag flux increases. So eddy currents increase. Heats faster

(edited 11 months ago)

Reply 85

yaaasminnn

Original post by faisal_345

What did you write in part B,does it heat faster when the frequency increases

I said rate of change of flux linkage increases, so emf induced increases and it heats up more + at a faster rate

Reply 86

Amin9127

Original post by Warren Fernandes

Thought a higher f would meam it would alternate faster so rate of change of mag flux increases. So eddy currents increase. Heats faster

Yeh makes more sense than mine

Reply 87

lucas_b

What did you get for the cricket one? I thought that they would catch it @ like 2.15m height

Reply 88

nic27683

yes i got roughly the same !

Original post by lucas_b

What did you get for the cricket one? I thought that they would catch it @ like 2.15m height

Reply 89

thearchie

Original post by lucas_b

What did you get for the cricket one? I thought that they would catch it @ like 2.15m height

i got 2 something meters i cant remember exactly that sounds right

Reply 90

Warren Fernandes

Original post by thearchie

i got 2 something meters i cant remember exactly that sounds right

Yeah sounds about right

Reply 91

lucas_b

Original post by nic27683

yes i got roughly the same !

Great. 11.5Ns and 38.5 degrees for the vectors?

Reply 92

nic27683

Original post by lucas_b

Great. 11.5Ns and 38.5 degrees for the vectors?

i got 11.1 and 38

Reply 93

lucas_b

Original post by lucas_b

Great. 11.5Ns and 38.5 degrees for the vectors?

Also I thought the transistor/lux one would trigger at 30lux or about 3000ohm because using the potential divider equation it was exactly 0.7V. Graph was weird though

Reply 94

Warren Fernandes

Original post by lucas_b

Also I thought the transistor/lux one would trigger at 30lux or about 3000ohm because using the potential divider equation it was exactly 0.7V. Graph was weird though

Yup. Its a log graph

Reply 95

Warren Fernandes

Original post by nic27683

i got 11.1 and 38

Can u send Me a schematic of how ur vector diagram roughly looked like

Reply 96

lucas_b

The one question I found strange was the moments one because it was asking the force on the horizontal beam from x. I initially thought tension but just decided that the force on y from x wasn’t a component so it was like 500N or smth.