RL串联电路,电流i=2√2sin(1000t)A,R=30Ω，L=0.04H.则电压u=(____)V。
A100√2sin(1000t+53.1°)$;$100√2sin(1000t+36.9°）$;$60√2sin(1000t）$;$80√2sin(1000t+90°）
B100√2sin(1000t+53.1°)$;$100√2sin(1000t+36.9°）$;$60√2sin(1000t）$;$80√2sin(1000t+90°）
C100√2sin(1000t+53.1°)$;$100√2sin(1000t+36.9°）$;$60√2sin(1000t）$;$80√2sin(1000t+90°）
D100√2sin(1000t+53.1°)$;$100√2sin(1000t+36.9°）$;$60√2sin(1000t）$;$80√2sin(1000t+90°）