GCSE edexcel physics paper 2 (unofficial mark scheme)Watch
3 ohms for the resistance one,
8g for the moments,
1.5V per lamp.
yeah it is out of 200, but for the old spec which was really easy an A* was only 82% last year, and thats 164, so i doubt it would be much higher and in our mocks, i'm at a grammar school the grade 9 was calculated using the formula and it came out as 78%