Question 17N.2.HL.TZ0.8c
| Date | November 2017 | Marks available | [Maximum mark: 4] | Reference code | 17N.2.HL.TZ0.8c |
| Level | HL | Paper | 2 | Time zone | TZ0 |
| Command term | Compare | Question number | c | Adapted from | N/A |
A non-uniform electric field, with field lines as shown, exists in a region where there is no gravitational field. X is a point in the electric field. The field lines and X lie in the plane of the paper.
The electron is replaced by a proton which is also released from rest at X. Compare, without calculation, the motion of the electron with the motion of the proton after release. You may assume that no frictional forces act on the electron or the proton.
[4]
proton moves to the right/they move in opposite directions
force on each is initially the same
proton accelerates less than electron initially «because mass is greater»
field is stronger on right than left «as lines closer»
proton acceleration increases «as it is moving into stronger field»
OR
electron acceleration decreases «as it is moving into weaker field»
Allow ECF from (b)
Accept converse argument for electron
