Available practice: 77 of 100 marks. Parts 1(b), 4(b)(i), 4(c), 6(a)(ii), 6(b)(ii), 7(a)(i), 7(a)(ii), 9(b)(i), 9(c), 10(b)(ii) await marking support. Scores cover available parts only.
(a)State Coulomb's law.
Answer guidance
State A short answer. No explanation is needed, and adding one cannot earn extra marks.
[2 marks]
Two charged metal spheres A and B are situated in a vacuum, the shortest distance between their surfaces being 6.0 cm; point P lies on the line joining their centres a distance x from the surface of sphere A.
(b)(ii)A proton is at point P where x = 5.0 cm. Use data from Fig. 4.2 to determine the magnitude of the acceleration of the proton.
Answer guidance
Using You must use the thing it names. An answer that reaches the right value another way may not score.