10. 額定 200V, 60Hz 交流電壓, 其負載電流為 10A, 60Hz, 具落後電壓 30 度的相位角, 則兩者的表達以下何者正確? (A) V(t) = 200sin(60t), I(t) = 10sin(60t - 30) (B) V(t) = 200√2 sin(120πt), I(t) = 10√2 sin(120πt - \( \frac{\pi}{6} \)) (C) V(t) = 200sin(60t), I(t) = 10sin(60t + 30) (D) V(t) = 200√2 sin(120πt), I(t) = 10√2 sin(120πt + \(\frac{\pi}{6} \))