I just did the physics AQA unit 1 paper june 2010....and honestly it was quite easy. compared to the 3 other past papers...i wud say it was the easiest. there are 3 points tht i wud take down 4rm this paper:
1) A question about decay is about how a element goes 4rm one element to another via alpha emission, then goes to another by beta minus decay. So dont limit ur thought tht only type of emission can occur for a substance to become stable.
2) The 6 marker (there was only one) concerned a thermistor. To vary the temperature, it was important tht it was placed in a water bath.
3) Non-ohmic conductor: a component which resistance varies.