挑战习题
1/5单选题
难度:

1.在“测定小灯泡额定功率”的实验中,当手移动变阻器滑片时,眼睛应观察(  )
A 灯泡的发光情况
B 变阻器滑片的位置
C 电压表的示数
D 电流表的示数
提示1:
5Zyo4oCc5rWL5a6a5bCP54Gv5rOh6aKd5a6a5Yqf546H4oCd55qE5a6e6aqM5Lit77yM5b+F6aG75oqK5bCP54Gv5rOh5Lik56uv55qE55S15Y6L6LCD6Iez6aKd5a6a55S15Y6L
正确答案:Qw==
6aKd5a6a5Yqf546H5piv5oyH55So55S15Zmo5Zyo6aKd5a6a55S15Y6L5LiL55qE5Yqf546H77yM4oCc5rWL5a6a5bCP54Gv5rOh6aKd5a6a5Yqf546H4oCd5q2j56Gu55qE5pON5L2c5q2l6aqk5bqU6K+l5piv56e75Yqo5ruR54mH5pe277yM5ZCM5pe26KeC5a+f55S15Y6L6KGo55qE56S65pWw77yM55u05Yiw562J5LqO5bCP54Gv5rOh55qE6aKd5a6a55S15Y6L77yM6K6w5LiL5q2k5pe255S15rWB6KGo55qE56S65pWw77yM54S25ZCO5qC55o2uUD1VSeiuoeeul+WHuuWwj+eBr+azoeeahOmineWumuWKn+eOh++8juaVhemAiUPvvI4=