| Date | May 2011 | Marks available | 3 | Reference code | 11M.2.HL.TZ2.7 |
| Level | Higher level | Paper | Paper 2 | Time zone | Time zone 2 |
| Command term | Draw | Question number | 7 | Adapted from | N/A |
Question
This question is in two parts. Part 1 is about electric charge and resistance. Part 2 is about orbital motion.
Part 1 Electric charge and resistance
Two plastic rods each have a positive charge +q situated at one end. The rods are arranged as shown.
Assume that the charge at the end of each rod behaves as a point charge. Draw, in the shaded area on the diagram
(i) the electric field pattern due to the two charges.
(ii) a line to represent an equipotential surface. Label the line with the letter V.
Markscheme
(i) 
at least four field lines (minimum two per rod) to show overall shape of pattern; direction of lines all away from poles;
Ignore all working outside region.
Any field lines crossing loses first mark even if accidental.
(ii) any line labelled V perpendicular to the field lines it traverses; (judge by eye)
Ignore unlabelled lines as they could be field lines.
