JUST DID THE TEST, IT WAS THE HARDEST PAPER 2 THEYVE EVER MADE!!!!!!!!!!?? :( Idk what theyre smoking at aqa but the calculation questions were sooo hard, like how is it possible that i got 90%+ in physcis at Gcse and can barely get 50% at A level. Even though the grade distribution will reflect the paper, i think i do better relative to other students on easier papers, so this was not good
what is seriously wrong with aqa, why not make the first 2 questions straightforward to build up students confidence and then actually test us on those longer/harder questions. that just sounds more logical to me. i feel like they just shattered every ounce of confidence from the get go that i was even blanking on the easy questions. i didn’t even have time to finish the multiple choice🤦🏽♂️
@@ScienceShorts I genuinely think that aqa have a fetish of making the hardest possible questions for a-level physics, and making students regret they choose physics,
@@hassanalrubai7378 100%, I love physics as its own subject but AQA take all the satisfaction of learning and understanding out of it with their stupid papers
in the 2017 Aqa paper 2 there was a question about fission reactors, and saying the moderator absorbed neutrons loses you the mark. Instead you are supposed to say the neutrons bounce off the moderator and collide to release some energy. (I think)
Control rods absorb neutrons, moderator rods slow down fast moving neutrons through a series of collisions to allow them to be able to cause a fission ( if the neutron is too fast, it wont cause a fission as it won't be absorbed by the target nucleus)
@@lolaharwood619 moderator is the water so they are not rods, neutrons bounce off the hydrogen nuclei (which us just a proton) and lose momentum and therefore velocity
I am confused about the eddy currents in transformers. I get what eddy currents are, they are because of Lenz's law to oppose change of flux linkage but how can you reduce them in transformers, if you can reduce them doesn't that mean Lenz's law doesn't apply or is it because there is an induced emf so all the power is in the induced emf
No, eddy currents are not strictly a lenzs law thing. It's just the fact that the electrons in the core experience the field, so start to flow about themselves - we don't want that.
field lines show the direction a positively charged test mass would move. Field lines point away, so the positive test charge is being repelled and the ball must be positively charged.
I swear some of the topics in magnetism (mass spectrometer & back emf) aren't in the spec? They don't seem to be in the aqa syllabus so I'm confused as to whether or not we need to know these
@@klzzz Top tip for studying. Don't ask ChatGPT a question that you can look up in a textbook that based on the specification that you are going to be assessed on.
@@klzzz If two charges are equal and opposite to each other (e.g. +1C and -1C), the midpoint would have a electric potential of zero. Since electrons don't have the opposite charges, there is a electric potential between them that can be calculated using the necessary equations.
Basically the alpha particle decelerates as it gets closer to the nucleus due to the repulsive force and at an instant when it is closest to it, its velocity is zero before it starts moving away. The loss in kinetic energy is equal to the gain in potential energy as it gets close
please help me am i supposed to be rounding in the middle of questions if i get stupidly long numbers or do i have to write the whole number out. I got worried in paper 1 and started writing out every number in full except for the final answer
You should get the marks even if you round in the middle of questions - it's your methodology that's important. My recommendation: write down calculated values to 4 sf in order to mitigate rounding issues.
As someone doing A level physics I would say that if u can't get a 9 at gcse ( like if u actually tried and revised but got an 8 ) Than it will be difficult to even get above a B-C at A level, because u r no longer competing against 80% bots who dont try, and 7 or less at gcse means ur doomed imo
at 17:21, you said starlink is a communications satelite held in a geosynchronus orbit. That is not true it is in low earth orbit, that is why its beating out all other traditional satelite internet companies.
