20160412

Physics quiz question: emf source with most current

Physics 205B Quiz 4, spring semester 2016
Cuesta College, San Luis Obispo, CA

A light bulb and a resistor are connected to two ideal emf sources. The __________ emf source has more current flowing through it.
(A) 1.5 V.
(B) 6.0 V.
(C) (There is a tie.)
(D) (Not enough information is given.)

Correct answer (highlight to unhide): (C)

From Kirchhoff's junction rule, the amount of current flowing through the two emf sources must be the same, as they are in series with each other.

Sections 30882, 30883
Exam code: quiz04T4nK
(A) : 5 students
(B) : 6 students
(C) : 25 students
(D) : 0 students

Success level: 69%
Discrimination index (Aubrecht & Aubrecht, 1983): 0.35

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