Astronomy quiz question: G5 white dwarf vs. M0 red dwarf

Astronomy 210 Quiz 5, spring semester 2018
Cuesta College, San Luis Obispo, CA

A G5 white dwarf and an M0 red dwarf could have the same:
(A) luminosity.
(B) size.
(C) temperature.
(D) (Two of the above choices.)
(E) (All of the above choices.)
(F) (None of the above choices.)

Correct answer (highlight to unhide): (F)

An H-R diagram is provided with this quiz.


These stars are plotted on an H-R diagram below. The G5 white dwarf is less luminous, smaller in size, and hotter in temperature than the M0 red dwarf.


Section 30674
Exam code: quiz05Sbn3
(A) : 0 students
(B) : 5 students
(C) : 0 students
(D) : 4 students
(E) : 0 students
(F) : 12 students

Success level: 64% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.60

Section 30676
Exam code: quiz05So1L
(A) : 7 students
(B) : 12 students
(C) : 1 student
(D) : 8 students
(E) : 0 student
(F) : 14 students

Success level: 37% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.73