I put down infrared and red light as those were the 2 lights used in 1 of the past exams.
As for the KE and number of electrons questions, I got both minus answers. What we had to do was not use the minus that was given to us (-1.6*10^-19 I think it was and we had to use 1.6*10^-19). However due to crappy CGP revision guide and the lack of past paper questions simmilar, I only find out after the exam. -.- The annoying thing was my instincts was telling me you can't have minus number of electrons flowing but I didn't listen to it.
I also know for sure I lost the mark in the drawing xray beams. I scan read the question and though each arrow was a beam, so I only drew 2 arrows, Then got told after the exam you had to draw 4 >.<.
The ultrasound question I put hit the boundary of a less dense material and angle of incidence > critical angle. Don't know if I'm correct but I got totally confused.
The hearbeat question, I did the correct working out but rounded to 3 S.F. I then got told you can't have 0.7 of a hearbeat. I hope the mark scheme is kind and accepts 66.7
The graph question at the end and proton treatmeant was totally random too. I think I wrote reasonable answers but considering they were the "A* questions" end questions I guess they might have wanted more specific answers.
Compared to chemistry which followed the exact format of past papers, the physics one did not. I'm hoping thats enough to push the grade boundaries right down.