【单选题】如图所示的电路中,电感原来不储存磁场能,在开关闭合时,LED1和LED2的状态变化是( )In the circuit shown in the figure, the inductor does not store the magnetic field energy. after switch-on, the s LED1 and LED2 are ( )【图片】
A.
LED1 和LED2都立即亮且一直亮 on immediately and always
B.
LED1 都立即亮且一直亮,LED2不亮 LED1 is on immediately and always, LED2 is not on
C.
都不亮 all not on
D.
LED1都立即亮,之后慢慢熄灭,LED2不亮,LED1 is on immediately, then Extinguish slowly, LED2 is not on