Year 12s: what will be the first way you research your future options? >>

AQA Physics GCSE P2 & P3 [OFFICIAL THREAD]

Scroll to see replies

I think Hooke's Law is likely to come up.
Also they'll try and confuse us with velocity-time graphs and distance-time graphs and working out the distance

What d'you think they'll ask about hookes law?

Reply 601

hannah4475

Mine starts at half 1 :smile:

Reply 602

Hxzel

Original post by Jules12345

What d'you think they'll ask about hookes law?

Maybe the experiment and also the fact that the extension of a spring is directly proportional to the force applied providing that the limit of proportionality hasn't been reached, also they may show results and you have to identify where the limit of proportionality is

Posted from TSR Mobile

Reply 603

Noomi_J

Can some one please please please explain switch mode transformers to me please.

Reply 604

11Jason11

Original post by Jules12345

What d'you think they'll ask about hookes law?

They may provide a graph, ask where the limit of proportionality is

Reply 605

11Jason11

Original post by Noomi_J

Can some one please please please explain switch mode transformers to me please.

Switch mode transformers
Can operate at high frequencies (50Hz to 200Hz)
Lighter and Smaller than transformers (which is an advantage)
Use in mobile phone chargers
Very little power used
Cheaper

Reply 606

hannah4475

Original post by Noomi_J

Can some one please please please explain switch mode transformers to me please.

Basically they work at much higher frequences (e.g. 50 kHz) so thy are much lighter and smaller than traditional transformers that work at 50 Hz mains supply. Therefore they're useful for mobile phone chargers.

Also, they use very little power when switched on but no load (e.g. phone) applied.

Hope this helps :smile:

Reply 607

sophiathefirst

Original post by Pra99

I bet my house that the 6 marker in p2 will be about stars