配套习题- 串、并联电路中电压的规律 -【青果学苑】

1/5单选题

难度：

1.有一种节日彩灯上串联着50只相同的灯泡，如果电源电压为220V，则每只小灯泡两端的电压为（　　）

A	220V
B	44V
C	4.4V
D	0V

正确答案：Qw==

6Kej77ya5Zug5Li65Liy6IGU55S16Lev5Lit55S16Lev5Lik56uv55qE5oC755S15Y6L562J5LqO5ZCE6YOo5YiG55So55S15Zmo5Lik56uv55qE55S15Y6L5LmL5ZKM77yM5omA5Lul5bCGNTDlj6rlsI/nga/ms6HvvIjkuLLogZTvvInmjqXliLAyMjBW55qE5a625bqt55S16Lev5Lit77yM5q+P5Y+q54Gv5rOh55qE55S15Y6L5Li6NC40Vu+8juaVhemAiUPvvI4=

2/5单选题

难度：

2.如图所示的电路图中，当开关S₁闭合时，电压表的示数是3V，若再将开关S₂闭合，则电压表的示数会( )

A	不变
B	减小
C	增大
D	无法确定

正确答案：QQ==

55Sx55S16Lev5Zu+5Y+v55+l77yM5b2T5byA5YWzUzxzdWI+MTwvc3ViPumXreWQiOaXtu+8jOeUteWOi+ihqOaOpeWIsOS6hueUtea6kOS4pOerr++8jOa1i+eahOaYr+eUtea6kOeUteWOi++8jOeUteWOi+ihqOeahOekuuaVsOaYrzNW77yM6K+05piO55S15rqQ55S15Y6L5pivM1bvvJvlvZPlho3lsIblvIDlhbNTPHN1Yj4yPC9zdWI+6Zet5ZCI5pe277yM55S15Y6L6KGo5LuN54S25piv5o6l5Yiw55S15rqQ55qE5Lik56uv77yM5LuN54S25piv5rWL55qE55S15rqQ55S15Y6L77yO5omA5Lul56S65pWw5pivM1bjgILmlYXpgIlBLg==

3/5单选题

难度：

3.

如图所示的电路中，当s闭合时，电压表V₁的示数是7.5V，V₂示数是9V，若电源电压为12 V，则L₂两端的电压为（）

A	4.5V
B	7.75V
C	3V
D	2V

正确答案：QQ==

55S15Y6L6KGoVjxzdWI+MTwvc3ViPua1i0w8c3ViPjE8L3N1Yj7lkoxMPHN1Yj4yPC9zdWI+55qE5oC755S15Y6L77yM55S15Y6L6KGoVjxzdWI+Mjwvc3ViPua1i0w8c3ViPjI8L3N1Yj7lkoxMPHN1Yj4zPC9zdWI+55qE5oC755S15Y6L77yM55S15rqQ55S15Y6L5Li6MTJW77yM5qC55o2u5Liy6IGU55S16Lev5Lit55S16Lev5Lik56uv55qE5oC755S15Y6L562J5LqO5ZCE6YOo5YiG55So55S15Zmo5Lik56uv55qE55S15Y6L5LmL5ZKM77yM5Y+v5b6XTDxzdWI+MTwvc3ViPuS4pOerr+eahOeUteWOi+S4uu+8mjEyVi05Vj0zVu+8jOaJgOS7pUw8c3ViPjI8L3N1Yj7kuKTnq6/nmoTnlLXljovkuLrvvJo3LjVWLTNWPTQuNVbvvIzmlYXpgIlBLg==

4/5单选题

难度：

4.如图所示，将电压表先后并联接在AB处、BC处、AC处，当开关S闭合后，电压表读数最大时，是接在（　　）

A	A、C处
B	A、B处
C	B、C处
D	三处一样大

正确答案：QQ==

5Zug5Li65Lik54Gv5rOh5piv5Liy6IGU77yM5omA5Lul5oC755S15Y6L562J5LqO5ZCE6YOo5YiG55S15Y6L55qE5ZKM77yb5Y2zVTxzdWI+QUM8L3N1Yj49VTxzdWI+QUI8L3N1Yj4rVTxzdWI+QkM8L3N1Yj7vvJvmiYDku6VBQ+S5i+mXtOeahOeUteWOi+acgOWkp++8juaVhemAiUHvvI4=

5/5单选题

难度：

5.

如右图所示的电路中，当开关S闭合时，电压表V₁的示数为3 V，V₂的示数为6 V，则电源电压为（）

A	3 V
B	6 V
C	9 V
D	12V

正确答案：Qw==

PHA+55S15Y6L6KGoVjxzdWI+MTwvc3ViPua1i0U8c3ViPjE8L3N1Yj7nmoTnlLXljovvvIznlLXljovooahWPHN1Yj4yPC9zdWI+5rWLRTxzdWI+Mjwvc3ViPueahOeUteWOi++8jOeUseS6juaYr+S4suiBlOeUtei3r++8jOaJgOS7peeUtea6kOeUteWOi+S4uu+8mjNWKzZWPTlW77yM5pWF6YCJQy48L3A+