AQA Physics GCSE P2 & P3 [OFFICIAL THREAD]

Guys whoever did the p2 2014 paper for practice- what mark did you get?

I have not really thought about it; hopefully stars will come up, there was a lot on static electricity in the 2014 paper so I doubt we will be seeing much of that, what do you think?

Good luck everyone!

Can I just take this moment to complain how my sibling litera;;y just revised today and went from a C to an A* in a day, it's a p*ss take in my opinion and its unfair to all the people like me who spend so long revising. So basically anything is impossible.

nice , are you predicted an a star?

Is this talking about electrical circuits?
If it is then for a filament bulb at least, the resistance of the bulb increases as the current increases. This is because an increase in current causes the wire in the bulb to heat up, therefore increases the kinetic energy of the ions in the metal wire. As the kinetic energy is greater and the metal ions vibrate more, the electrons (current) cannot pass through the wire as easily as there as more collisions between these electrons and the ions in the wire, hence the resistance increases as the current increases.

Does this make sense? Don't worry about physics, just try your best!! 💪

On the spec for P2 it says "Candidates should be able to explain resistancechange in terms of ions and electrons."
but I dont know what it is ... Can someone please explain it to me please!!! Thanks and good luck... for me physics is my worst science anways

"Hard work always beats talent."

XD ssh I was like "well done" but in my head "i want to kill you"

Yes it is and it actually makes so much sense now THANKS SO SO MUCH. Good luck and may you get good grades .... p.s your my lifesaver lol

I agree with you, though I'm praying for a lot on stars! And nuclear fission / fusion! And lots and lots of equations, just no momentum

Can someone please explain regenerative braking please? P2

Is this talking about electrical circuits?
If it is then for a filament bulb at least, the resistance of the bulb increases as the current increases. This is because an increase in current causes the wire in the bulb to heat up, therefore increases the kinetic energy of the ions in the metal wire. As the kinetic energy is greater and the metal ions vibrate more, the electrons (current) cannot pass through the wire as easily as there as more collisions between these electrons and the ions in the wire, hence the resistance increases as the current increases.

Does this make sense? Don't worry about physics, just try your best!! 💪

I think it is when in a smart car or electric car, when the brakes are applied all the kinetic energy transferred that would have been wasted as heat is converted to electrical then chemical, which is used to charge the cars battery

Guys whoever did the p2 2014 paper for practice- what mark did you get?

Yep - according to the CGP book:

"rather than converting the kinetic energy of the vehicle inot heat energy, the brakes put the vehicles motor into reverse. With the motor running backwards the wheels are slowed. At the same time, the motor acts as an electric generator converting kinetic energy into electrical energy that is stored as chemical energy in the vehicle's battery."

So basically they store the energy of braking rather than wasting it.

I hope that helps!

Can someone please explain regenerative braking please? P2

If you want a hand with any other topics in P2 then let me know.