6.
![](http://thumb.zyjl.cn/pic3/quiz/images/201501/201/dba428c3.png)
某興趣小組用如圖所示的電路研究自感現(xiàn)象,圖中A、B是兩個(gè)相同的小燈泡,D
1、D
2是兩個(gè)理想二極管,L是自感系數(shù)大,直流電阻明顯小于燈泡電阻的線圈,R為保護(hù)電阻,關(guān)于實(shí)驗(yàn)現(xiàn)象下列說(shuō)法中正確的是( )
| A. | 閉合開(kāi)關(guān),A、B兩燈同時(shí)亮,隨后逐漸變暗 |
| B. | 閉合開(kāi)關(guān),B燈不亮,A燈亮,隨后逐漸變暗 |
| C. | 閉合開(kāi)關(guān)穩(wěn)定后斷開(kāi)開(kāi)關(guān),A、B兩燈同時(shí)亮,隨后逐漸熄滅 |
| D. | 閉合開(kāi)關(guān)穩(wěn)定后斷開(kāi)開(kāi)關(guān),B燈不亮,A燈亮,隨后逐漸熄滅 |