DP Physics (last assessment 2024)
Question 18M.3.SL.TZ1.2c
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.SL.TZ1.2c |
| Level | SL | Paper | 3 | Time zone | TZ1 |
| Command term | Outline | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 2]
18M.3.SL.TZ1.2c
An experiment to find the internal resistance of a cell of known emf is to be set. The following equipment is available:
(c)
Outline how using a variable resistance could improve the accuracy of the value found for the internal resistance.
[2]
Markscheme
variable resistor would allow for multiple readings to be made
gradient of V-I graph could be found «to give r»
Award [1 max] for taking average of multiple.
[2 marks]
