DP Physics (last assessment 2024)
Question 19M.3.SL.TZ2.c
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.SL.TZ2.c |
| Level | SL | Paper | 3 | Time zone | TZ2 |
| Command term | Outline | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 1]
19M.3.SL.TZ2.c
The Hertzsprung-Russell (HR) diagram shows several star types. The luminosity of the Sun is L☉.
Outline why the Sun will maintain a constant radius after it becomes a white dwarf.
[1]
Markscheme
electron degeneracy <<prevents further compression>> ✔
Ignore mention of the Chandrasekhar limit.
Award [0] for answer mentioning radiation pressure or fusion reactions.
Examiners report
The mention of electron degeneracy pressure was fairly common, but incorrect answers were even more common at SL.
