1/7单选题
难度：
1.
如图所示，如果把这两个灯并联在110V的电路中，它们消耗的总功率为（ ）
| A | 125W |
| B | 62.5W |
| C | 31.25W |
| D | 25W |
- 提示1：
- PHA+55Sx5Zu+55+l55Sy54Gv6aKd5a6a5Yqf546H5Li6MjVX77yM5LmZ54Gv55qE6aKd5a6a5Yqf546H5Li6MTAwVyA8YnI+PC9wPg==
- 提示2：
- 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
正确答案：Qw==
PGRpdj7nlLLnga/pop3lrprlip/njofkuLoyNVfvvIzkuZnnga/nmoTpop3lrprlip/njofkuLoxMDBXIO+8m+eUteWOi+WPmOS4uuWOn+adpeeahOS6jOWIhuS5i+S4gO+8jOWug+S7rOWQhOiHquWPkeaMpeeahOWKn+eOh+WPquiDveaYr+WOn+adpeeahOWbm+WIhuS5i+S4gOOAguaVhUPmraPnoa7jgII8YnI+PC9kaXY+
2/7单选题
难度：
2.标有“PZ220- 40”的灯泡L1和标有 “PZ220-100”的灯泡L2串联在220伏的电路中， 关于灯的亮度正确的是：（ ）
| A | L1亮 |
| B | L2亮 |
| C | 一样亮 |
| D | L2能正常发光 |
- 提示1：
- IOS4pOeBr+S4suiBlO+8jOWunumZheWKn+eOh+i2iuWkp++8jOeBr+azoei2iuS6rg==
- 提示2：
- IOagueaNrlA9PGltZyB3aWR0aD0xNyBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yNC8zNy9yQkFDRTFNTW1PNkNvQkhhQUFBQmVVODJ1eXc3NTgucG5nIj7lj6/nn6XvvIznga9MPHN1Yj4xPC9zdWI+55qE55S16Zi7UjxzdWI+MTwvc3ViPuWkp+S6juetiUw8c3ViPjI8L3N1Yj7nmoTnlLXpmLtSPHN1Yj4yPC9zdWI+77yM5Liy6IGU55S16Lev55S15rWB5aSE5aSE55u4562J77yM5a6e6ZmF5Yqf546HUDxzdWI+5a6ePC9zdWI+PUk8c3VwPjI8L3N1cD5S77yM5YiZ54GvTDxzdWI+MTwvc3ViPueahOWunumZheWKn+eOh+Wkp+S6jueBr0w8c3ViPjI8L3N1Yj7nmoTlrp7pmYXlip/njoc=
正确答案：QQ==
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
3/7单选题
难度：
3.将标有“6V 3W” 和“12V 12W”的甲、乙两灯泡串联接在18V电路中，下列说放正确的是（ ）
| A | 只有甲灯正常发光 |
| B | 只有乙灯正常发光 |
| C | 两灯都能正常发光 |
| D | 两灯都不能正常发光 |
- 提示1：
- IOeBr+azoeeahOWunumZheeUteWOi+etieS6jueBr+azoeeahOmineWumueUteWOi+aXtuato+W4uOWPkeWFiQ==
- 提示2：
- IOagueaNrlA9PGltZyB3aWR0aD0xNyBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yNC8zNy9yQkFDRTFNTW1PNkNvQkhhQUFBQmVVODJ1eXc3NTgucG5nIj7lj6/nn6XvvIznga9MMeeahOeUtemYu1Ix562J5LqOTDLnmoTnlLXpmLtSMuetieS6jjEyzqnvvIzliJnkuKTnga/nlLXljovnm7jnrYnvvIzpg73mmK85Vu+8jOWImeS4pOeBr+mDveS4jeiDveato+W4uOWPkeWFiQ==
正确答案：RA==
PGRpdj7nga/ms6HnmoTlrp7pmYXnlLXljovnrYnkuo7nga/ms6HnmoTpop3lrprnlLXljovml7bmraPluLjlj5HlhYnvvJvmoLnmja5QPTxpbWcgd2lkdGg9MTcgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjQvMzcvckJBQ0UxTU1tTzZDb0JIYUFBQUJlVTgydXl3NzU4LnBuZyI+5Y+v55+l77yM54GvTDxzdWI+MTwvc3ViPueahOeUtemYu1I8c3ViPjE8L3N1Yj7nrYnkuo5MPHN1Yj4yPC9zdWI+55qE55S16Zi7UjxzdWI+Mjwvc3ViPuetieS6jjEyzqnvvIzliJnkuKTnga/nlLXljovnm7jnrYnvvIzpg73mmK85Vu+8jOWImeS4pOeBr+mDveS4jeiDveato+W4uOWPkeWFie+8jETmraPnoa48L2Rpdj4=
4/7单选题
难度：
4.将标有“12V 8W”的灯泡接在某电路两端它的实际功率是2瓦，加在灯两端的实际电压为（ ）
| A | 12V |
| B | 10V |
| C | 8V |
| D | 6V |
- 提示1：
- 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
正确答案：RA==
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
5/7单选题
难度：
5.
两个定值电阻阻值都为R0，电源电压U保持不变，
如果把两个电阻并联使用，仍接在电压U的电路中，消耗的总电功率将（ ）
| A | 变为原来的四分之一 |
| B | 变为原来的二分之一 |
| C | 变为原来的三分之一 |
| D | 变为原来的二倍 |
- 提示1：
- PHA+55S16Zi75bm26IGU5ZCO77yM5Y+Y5Li65Y6f5p2l55S16Zi755qE5LiA5Y2KPGJyPjwvcD4=
- 提示2：
- PHA+55S15Y6L5LiN5Y+Y77yM5qC55o2uUD08aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjQvMzcvckJBQ0UxTU1tTzZDb0JIYUFBQUJlVTgydXl3NzU4LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yNC8zNy9yQkFDRTFNTW1PNkNvQkhhQUFBQmVVODJ1eXc3NTgucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iMTciPjxicj48L3A+
正确答案：RA==
PGRpdj7nlLXmupDnlLXljotV5LiN5Y+Y77yM5qC55o2uUD08aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjQvMzcvckJBQ0UxTU1tTzZDb0JIYUFBQUJlVTgydXl3NzU4LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yNC8zNy9yQkFDRTFNTW1PNkNvQkhhQUFBQmVVODJ1eXc3NTgucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iMTciPu+8jCDnlLXpmLvlj5jkuLrljp/mnaXkuIDljYrvvIzlip/njoflj5jkuLrljp/mnaXnmoQy5YCN77yM5YiZROato+ehrjxicj48L2Rpdj4=
6/7单选题
难度：
6.
如图将灯L1“6V 3W”和L2“6V 6W”串联（灯泡电阻不变），现要使其中一盏灯长时间正常发光，则电路的总功率为（ ）
| A | 9W |
| B | 6W |
| C | 4.5W |
| D | 5.4W |
- 提示1：
- PHA+5qC55o2uUD08aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjQvMzcvckJBQ0UxTU1tTzZDb0JIYUFBQUJlVTgydXl3NzU4LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yNC8zNy9yQkFDRTFNTW1PNkNvQkhhQUFBQmVVODJ1eXc3NTgucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iMTciPuaxguS4pOeBr+azoeeUtemYuzwvcD4=
- 提示2：
- PHA+5qC55o2u5Lik54Gv5rOh55S16Zi755yL5YiG5Y6L5oOF5Ya1PC9wPg==
- 提示3：
- PHA+5qC55o2uUj08aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDEvNDkvckJBQ0ZGTU1tUE9UMGNIMEFBQUJjRHpiU3cwODE4LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wMS80OS9yQkFDRkZNTW1QT1QwY0gwQUFBQmNEemJTdzA4MTgucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iMTciPuefpe+8jEw8c3ViPjE8L3N1Yj7nlLXpmLvkuLoxMs6p77yMTDxzdWI+Mjwvc3ViPueUtemYu+S4ujbOqe+8jOWImUw8c3ViPjI8L3N1Yj7nlLXljovkuLozVu+8jOaAu+eUteWOi+S4ujlWPC9wPg==
正确答案：Qw==
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
7/7单选题
难度：
7.看图两盏白炽灯的名牌，可知（ ）
| A | 甲灯一定比乙灯亮 |
| B | 正常发光时，甲灯的电阻大于乙灯的电阻 |
| C | 正常发光时，甲灯的电功率比乙灯大 |
| D | 正常发光时，甲灯的电能比乙灯多 |
- 提示1：
- IOeUseWbvuefpeeUsueBr+mineWumuWKn+eOh+S4ujI1V++8jOS5meeBr+eahOmineWumuWKn+eOh+S4ujEwMFfvvIzlip/njofotorlpKfvvIzljZXkvY3ml7bpl7TmtojogJfnmoTnlLXog73otorlpKc=
- 提示2：
- IOeBr+eahOS6ruW6puWPluWGs+S6juWug+eahOWunumZheWKn+eOh++8jOWunumZheWKn+eOh+i2iuWkp++8jOeBr+azoei2iuS6rg==
正确答案：Qg==
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