DP Physics (last assessment 2024)
Question 22M.2.HL.TZ1.7a
| Date | May 2022 | Marks available | [Maximum mark: 3] | Reference code | 22M.2.HL.TZ1.7a |
| Level | HL | Paper | 2 | Time zone | TZ1 |
| Command term | Calculate | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 3]
22M.2.HL.TZ1.7a
Two identical positive point charges X and Y are placed 0.30 m apart on a horizontal line. O is the point midway between X and Y. The charge on X and the charge on Y is +4.0 µC.
(a)
Calculate the electric potential at O.
[3]
Markscheme
use of ✓
OR 240 «kV» for one charge calculated ✓
480 «kV» for both ✓
MP1 can be seen or implied from calculation.
Allow ECF from MP2 for MP3.
Examiners report
This question was generally well approached. Two common errors were either starting with the wrong equation (electric potential energy or Coulomb's law) or subtracting the potentials rather than adding them.
