試題詳解

1.(10%) Given an RLC circuit. The current i(t) can be expressed bywhore Which of the following are correct?
(A) i(t) approaches zero at t→∞for any positive R, L,C value,
(B) Fort＞0, i(t) does not have sinusoidal component,
(C)
(D) For bo, i(t) is proportional toe',
(E) i(π)=0.