Cuesta College, San Luis Obispo, CA
Cf. Giambattista/Richardson/Richardson, Physics, 2/e, Problem 20.55
An ideal emf source is connected to an ideal resistor and inductor. The switch is closed at t = 0. Just after t = 0, the __________ side of the inductor is at a higher potential. (A) left.
(B) right.
(C) (There is a tie.)
(D) (Not enough information is given.)
Correct answer: (B)
Just after the switch is thrown at t = 0, increasing current will flow through the inductor from right-to-left. The resulting induced emf in the inductor will oppose this increasing current, resulting in the right side of the inductor being at a higher potential.
Section 30882
Exam code: quiz06LR1r
(A) : 10 students
(B) : 15 students
(C) : 2 students
(D) : 0 students
Success level: 56%
Discrimination index (Aubrecht & Aubrecht, 1983): 0.58
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