試題詳解

7. An ideal LC circuit with inductor L and capacitor C is initially charged with zero on the capacitor and a maximum instantaneous current of Io. Which of the following is true?
(A) The total energy of the LC circuit oscillates with time
(B) If one increases the capacitance of the capacitor while keeping the inductance and the initial charges and currents the same, the total energy will not change
(C) If one increases the inductance of the inductor while keeping the capacitance and the initial charges and currents the same, the total energy will not change
(D) The current will monotonically decay over time and reach zero

(E) None of the above