(6V)2 12Ω=3W,代入数据解得:PL=27W.答:(1)当开关S1、S2同时闭合,滑片P滑到a端时,电压表的示数为12V;(2)灯L的额定功率27W. 先画出两种情况的等效电路图:当开关S1闭合S2断开,滑片P滑到b端时,Rab、L串联如图甲所示;当开关S1、S2同时闭合,滑片P滑到a端时,Rab、R0并联如图乙所示;(1)根据P=I2R表示...
电路如图所示,R1=6Ω,R2=7Ω,R3=6Ω,R4=10Ω,则a,b两点之间的等效电阻Rab=( )A.8ΩB.10ΩC.12ΩD.9Ω
安小能、篮心羽、虞姬(12) - 你对所有女人都一样是吧
Keeping a diary in English does a great deal of good to my English study. Keeping a diary can help you review all the English knowledge you have learned. For example,you must know the correct spelling of each word needed in the diary;you must use the phrases correctly and choose the sui...