本课配套习题挑战模式1/5
在伏安法测电阻中要注意哪些事项
A: 连线时,开关断开 |
B: 闭合开关前,注意把滑变调到阻值最大的地方 |
C: 电压表和电流表量程尽量选择大一些. |
D: 多次测量取平均值 |
- 提示1:PHA+5YGa5aW95rWL6YeP5YmN55qE5YeG5aSH5bel5L2cPC9wPg==
- 提示2:PHA+5Li65LqG5rWL6YeP57K+5YeG6KaB5aSa5rWL6YeP5Yeg5qyhLjwvcD4=
- 提示3:PHA+6YCJ5oup5ZCI6YCC6YeP56iLPC9wPg==
- 答案:QSxCLEQ=
PGRpdj7lnKjlgZrmtYvph4/kuYvliY3lgZrlpb3liY3mnJ/lh4blpIcs5byA5YWz5pat5byALOa7keWKqOWPmOmYu+WZqOa7keWIsOacgOWkp+WkhC7pl63lkIjlvIDlhbPlkI4s6YCJ5oup5ZCI6YCC55qE55S15Y6L6KGo5ZKM55S15rWB6KGoLOivleinpi7mlLnlj5jmu5HniYdw55qE5L2N572uLOWkmua1i+mHj+WHoOasoemAieaLqeW5s+Wdh+WAvC48L2Rpdj4=
本课配套习题挑战模式2/5
A: |
B: |
C: |
D: |
- 提示1:IOeUtea1geihqOS4suiBlOWcqOeUtei3r+S4re+8jOS4lOS4suiBlOeUtei3r+WkhOWkhOebuOetiQ==
- 提示2:IOeUteWOi+ihqOW5tuiBlOWcqOeUtei3r+S4rQ==
- 提示3:IOeUteWOi+ihqOa1i1LnmoTnlLXpmLs=
- 答案:QQ==
PGRpdj7kvI/lronms5XmtYvnga/ms6HnlLXpmLvvvIznlLXmupDjgIHmu5Hliqjlj5jpmLvlmajjgIHnga/ms6HjgIHnlLXmtYHooajjgIHlvIDlhbPnu4TmiJDkuLLogZTnlLXot6/vvIznlLXljovooajlubbogZTlnKjlvoXmtYvnlLXpmLvkuKTnq6/vvIzliJlB5q2j56GuPC9kaXY+
本课配套习题挑战模式3/5
如果利用如图所示的电路来测量一个大电阻R,那么x、y、z应分别代表( )
A: 电流表、电压表、滑动变阻器 |
B: 电压表、电流表、滑动变阻器 |
C: 滑动变阻器、电流表、电压表 |
D: 电压表、滑动变阻器、电流表 |
- 提示1:PHA+55S15rWB6KGo5Liy6IGU5Zyo55S16Lev5LitPC9wPg==
- 提示2:PHA+55S15Y6L6KGo5bm26IGU5Zyo55S16Lev5LitPC9wPg==
- 提示3:PHA+55S15Y6L6KGo5bqU5rWL5a6a5YC855S16Zi7UueahOeUteWOizxicj48L3A+
- 答案:Qg==
PGRpdj7kvI/lronms5XmtYvnlLXpmLvml7bvvIzooqvmtYvnlLXpmLvkuI7mu5Hliqjlj5jpmLvlmajkuLLogZTvvIznlLXmtYHooajkuI7ooqvmtYvnlLXpmLvkuLLogZTvvIznlLXljovooajkuI7ooqvmtYvnlLXpmLvlubbogZTvvIzlm6DmraR65Li65ruR5Yqo5Y+Y6Zi75Zmo77yb6ICMeeS4jueUtemYu1LkuLLogZTvvIzmiYDku6XmraTooajlupTmmK/nlLXmtYHooajvvJt45bm26IGU5Zyo55S16Zi7UueahOS4pOerr++8jOaJgOS7peatpOihqOW6lOaYr+eUteWOi+ihqO+8jELpgInpobnmraPnoa48YnI+PC9kaXY+
本课配套习题挑战模式4/5
在“伏安法测电阻”的实验中,滑动变阻器起到的作用有( )
A: 改变电路中的电流 |
B: 改变被测电阻两端的电压 |
C: 改变被测电阻的阻值 |
D: 保护电路 |
- 提示1:PHA+5ruR5Yqo5Y+Y6Zi75Zmo5Y+v5Lul5pS55Y+Y55S16Lev5Lit55qE55S15rWBPGJyPjwvcD4=
- 提示2:PHA+5ruR5Yqo5Y+Y6Zi75Zmo5Y+v5Lul5pS55Y+Y6KKr5rWL55S16Zi75Lik56uv55S15Y6LPGJyPjwvcD4=
- 提示3:PHA+5ruR5Yqo5Y+Y6Zi75Zmo5Y+v5Lul6LW35Yiw5L+d5oqk55S16Lev55qE5L2c55SoPGJyPjwvcD4=
- 答案:QSxCLEQ=
PGRpdj4mbmJzcDvmu5Hliqjlj5jpmLvlmajlj6/ku6XmlLnlj5jnlLXot6/kuK3nmoTnlLXmtYHvvJvmu5Hliqjlj5jpmLvlmajlj6/ku6XmlLnlj5jooqvmtYvnlLXpmLvkuKTnq6/nlLXljovvvJvmu5Hliqjlj5jpmLvlmajlj6/ku6XotbfliLDkv53miqTnlLXot6/nmoTkvZznlKjjgILmiYDku6XmraPnoa7nrZTmoYjkuLpBQkQ8YnI+PC9kaXY+
本课配套习题挑战模式5/5
小明同学练习用伏安法测电阻,他所测电阻的阻值约为2Ω. 电压表的量程为3V,电流表的量程为3A. 测量结束后,他得到的结论是待测电阻的阻值为10Ω,则他在测量中所出现的错误可能是( )
A: 电压表和电流表的位置接反了 |
B: 他没有多次测量取平均值,致使误差过大 |
C: 电压表按15V量程读数,电流表按3A量程读数 |
D: 电压表按15V量程读数,电流表按0.6A量程读数 |
- 提示1:PHA+5Y+v6IO95Ye6546w55qE6ZSZ6K+v77yM55S15Y6L6KGo44CB55S15rWB6KGo6K+75pWw6ZSZ6K+v77yM55S15Y6L6KGo44CB55S15rWB6KGo44CB5b6F5rWL55S16Zi75omA5o6l5L2N572u5LiN5a+5PC9wPg==
- 提示2:PHA+5bqU5LiA5LiA5o6S6ZmkPC9wPg==
- 答案:Qw==
PGRpdj5B44CB5aaC5p6c55S15rWB6KGo5ZKM55S15Y6L6KGo5L2N572u5o6l5Y+N5LqG77yM55S16Lev55u45b2T5LqO5pat6Lev77yM55S15Y6L6KGo5rWL6YeP55S15rqQ55S15Y6L77yM55S15rWB6KGo56S65pWw5o6l6L+R5Li66Zu2LiDmraTpgInpobnplJnor6/vvJs8YnI+QuOAgeW3suefpeW+hea1i+eUtemYu+eahOmYu+WAvOe6puS4ujLOqe+8jOa1i+mHj+WAvOW6lOivpeaOpei/keaIluetieS6jjLOqe+8jOS4jeWPr+iDveS4ujEwzqnvvIzkuI7mtYvph4/mrKHmlbDlpJrlsJHmsqHmnInlhbPns7suIOatpOmAiemhuemUmeivr++8mzxicj5D44CB55S15Y6L6KGo5oyJMTVW6YeP56iL6K+75pWw77yM55S15rWB6KGo5oyJM0Hph4/nqIvor7vmlbDvvIzlvpfliLDnmoTnlLXljovjgIHnlLXmtYHmmK/lrp7pmYXnlLXmtYHnmoQ15YCN77yM5omA5Lul5pys6K+l5pivMs6p55qE55S16Zi75rWL5oiQ5LqGMTDOqS4g5q2k6YCJ6aG55q2j56Gu77ybPGJyPkTjgIHnlLXljovooajmjIkxNVbph4/nqIvor7vmlbDvvIznlLXmtYHooajmjIkwLjZB6YeP56iL6K+75pWw77yM5b6X5Yiw55qE55S15Y6L5piv5a6e6ZmF55S15Y6L55qENeWAje+8jOeUtea1geaYr+ato+ehrueUtea1geeahDxpbWcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMy83Ri9yQkFDRTFNTVowYXdTb1hWQUFBQkdnTE5PS281MzQucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzIzLzdGL3JCQUNFMU1NWjBhd1NvWFZBQUFCR2dMTk9LbzUzNC5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSI2Ij7vvIzmtYvph4/nmoTnlLXpmLvmmK/lrp7pmYXnlLXpmLvnmoQyNS4g5q2k6YCJ6aG56ZSZ6K+vPGJyPjwvZGl2Pg==