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OCR A A-level Physics Exploring Physics (H556/02) - 9th June 2023 [Exam Chat]

Reply 60

Z_GAMER

17

at the same time, reading the specitfication

Reply 61

Z_GAMER

17

Original post by Olivia294719

I think year 2 content is quite hard as well, but what I’ve seen from past papers the year 2 ones like electric fields and magnetic fields are usually more ‘straight forward’ and less ambiguously worded than year 1, so I’m sure you’ll be fine. Good luck :smile:

then the year 2 content may also be better!
this makes me feel a bit better! thx!
best of luck to you too!

Reply 62

FatalArcher

11

Im going through practicals, medical and 2022 paper rn

Reply 63

Z_GAMER

17

I'm also at the same time, writing down keywords and watching a YouTube video on medical physics

Reply 64

Z_GAMER

17

and making flashcards

(edited 10 months ago)

Reply 65

Tmuti

7

going through nuclear physics then looking at past papers i attempted + some year 1 content to get a refresher

Reply 66

Z_GAMER

17

Haven't done any revision for paper 2. I think will be fine with the Year 1 content, but not the Year 2 content.

So I'm juggling 5 revision activities at the same time.
Good idea?

(edited 10 months ago)

Reply 67

han17000

1

Original post by Olivia294719

Anyone have any ideas what they think the 6 marker practical will be. Really hoping it’s electricity and not waves or capacitors lol

it was plancks last year, internal resistance 2021, thermistor 2020, determine g 2019

my guess would be radioactivity/capacitance

(edited 10 months ago)

Reply 68

Z_GAMER

17

in A = λN.
does A stand for Activity or the decay constant?
or activity and decay constant is the same thing?

Reply 69

Darwizzy

3

Original post by Z_GAMER

in A = λN.
does A stand for Activity or the decay constant?
or activity and decay constant is the same thing?

A is activity
decay constant is lamba i believe

Reply 70

Z_GAMER

17

Original post by Darwizzy

A is activity
decay constant is lamba i believe

oh ok.
tysm!

Reply 71

Z_GAMER

17

is there any equations we need to remember?

Reply 72

Olivia294719

5

Original post by Z_GAMER

in A = λN.
does A stand for Activity or the decay constant?
or activity and decay constant is the same thing?

A is the activity and lambda is the decay constant. the definitions off of PMT are : the activity is the number of decays per unit time, and the decay constant is the probability of decay in a unit time

Reply 73

Darwizzy

3

can anyone explain what a B-scan is please

Reply 74

Olivia294719

5

Original post by Z_GAMER

is there any equations we need to remember?

A big one that’s not given is :
number of nuclei = (mass x avogadros constant)/molecular mass

Reply 75

Olivia294719

5

Original post by Darwizzy

can anyone explain what a B-scan is please

They’re a method of scanning tissue used for more complex structures than a-scans. They control the brightness of oscilloscope spot and used to determine the placentas position during pregnancy (sorry if that makes no sense it’s off of PMT lol)

Reply 76

Z_GAMER

17

Original post by Olivia294719

A is the activity and lambda is the decay constant. the definitions off of PMT are : the activity is the number of decays per unit time, and the decay constant is the probability of decay in a unit time