题目8单选题
单相半控桥式有续流二极管且带阻感性负载整流电路的触发角为α,则晶闸管导通角为( )A. <img src="https://p.ananas.chaoxing.com/star3/origin/7436d9a3a63286943f317da4ee1f8fbc.png"><br>B. <img src="https://p.ananas.chaoxing.com/star3/origin/0b3c7ab18582bee3e318dcd219764fee.png"><br>C. <img src="https://p.ananas.chaoxing.com/star3/origin/8d071dceee1f4d41d5ac14d617a2142c.png"><br>D. <img src="/ananas/latex/p/1668">