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Cambridge International AS A Level

4 π 2 f 2 y 0 2 × = ½ × 0.25 × 4 π 2 E × 0.42 2 so same (sign of charge) × (1.5 × 10 –2) 2 C1 energy = 1.9 × 10 –4 J A1 3(b) gradual decrease in amplitude, so light (damping) B1 Question Answer Marks 4(a) force proportional to product of charges and inversely proportional to the square of the separation B1 force between point ...

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