試題詳解

17. Four circuits have the form shown in Fig. 17. The capacitor is initially uncharged and the switch S is open. The values of the emf E, resistance R, and capacitance C for each of the circuits are
Circuit 1: E = 24V, R = 4Ω, C = 1μF
Circuit 2: E = 18V, R = 6Ω, C = 9μF
Circuit 3: E = 12V, R = 1Ω, C = 6μF
Circuit 4: E = 10V, R = 5Ω, C = 5μF
Rank the circuits according to the current just after switch S is closed, least to greatest.

(A) 1, 4, 3, 2
(B) 3, 1, 4, 2
(C) 4, 3, 2, 1
(D) 4, 2, 1, 3
(E) 3, 1, 2, 4