题目

I remember watching TV and seeing other children suffer in other parts of the world when I was a very little child. I would talk to myself, “When I grow up, when I can become rich, I'll save kids all over the world.”At the age of 17, I began my career here in America, and by 18, I started my first charity organization. I went on to team up with other organizations in the following years, and met, helped, and even lost some of the most beautiful souls, from six-year-old Jasmina Anema who passed away in 2010 from leukemia(白血病）---her story inspired thousands to volunteer as donors, to科学探究活动小组的同学们制作了一台家庭调光灯模型。如图所示是设计的电路图。其中小灯泡L标有“6 V 3 W”字样。当开关S扳到触点a时，小灯泡正常发光；当开关S扳向触点b时，通过小灯泡的电流变化了0.2 A。假定灯丝电阻及电源电压不变，求： (1) 小灯泡L的电阻值； (2) 开关S扳向触点b时，电阻R消耗的功率。