我想知道高中物理选修3—2的公式有哪些 求高中人教版物理选修3-1和3-2的公式!急
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6.T=
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7.I= =0.707Im Um= =0.707Um
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A.\u7535\u573a\u7ebf\u6240\u8868\u793a\u7684\u7535\u573a\u65b9\u5411\u662f\u81ea\u5de6\u5411\u5de6\u7684\u3002
B.\u7535\u573a\u7ebf\u6240\u8868\u793a\u7684\u7535\u573a\u65b9\u5411\u662f\u81ea\u53f3\u5411\u5de6\u7684\u3002
C.\u6b63\u7535\u8377q\u53d7\u7535\u573a\u529b\u65b9\u5411\u662f\u81ea\u5de6\u5411\u5de6\u7684\u3002
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A.\u76f8\u5f53\u4e8e\u5728\u7535\u538b\u4e3a10V\u7684\u4e24\u70b9\u95f4\u79fb\u52a8\u4e00\u4e2a\u7535\u5b50\u7535\u573a\u529b\u6240\u505a\u7684\u529f
B.\u76f8\u5f53\u4e8e\u5728\u7535\u538b\u4e3a1V\u7684\u4e24\u70b9\u95f4\u79fb\u52a810\u4e2a\u7535\u5b50\u7535\u573a\u529b\u6240\u505a\u7684\u529f
C.\u76f8\u5f53\u4e8e\u5728\u7535\u538b\u4e3a10V\u7684\u4e24\u70b9\u95f4\u79fb\u52a81\u5e93\u4ed1\u7535\u91cf\u7684\u7535\u8377\uff0c\u7535\u573a\u529b\u6240\u505a\u7684\u529f
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1.\u5173\u4e8e\u7535\u573a\u7ebf\u4e0b\u8ff0\u8bf4\u6cd5\u6b63\u786e\u7684\u662f( )
A.\u7535\u573a\u7ebf\u662f\u5ba2\u89c2\u5b58\u5728\u7684
B.\u7535\u573a\u7ebf\u4e0e\u8fd0\u52a8\u7535\u8377\u7684\u8f68\u8ff9\u662f\u4e00\u81f4\u7684
C.\u7535\u573a\u7ebf\u4e0a\u67d0\u70b9\u7684\u5207\u7ebf\u65b9\u5411\u4e0e\u7535\u8377\u5728\u8be5\u70b9\u53d7\u529b\u65b9\u5411\u53ef\u4ee5\u4e0d\u76f8\u540c
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2.\u4e24\u4e2a\u5e26\u7535\u5c0f\u7403\uff0c\u7535\u91cf\u5206\u522b\u4e3a+q\u548c\uff0dq\uff0c\u56fa\u5b9a\u5728\u957f\u5ea6\u4e3aL\u7684\u7ec6\u7edd\u7f18\u6746\u7684\u4e24\u7aef\uff0c\u7f6e\u4e8e\u7535\u573a\u4e2dA\u3001B\u4e24\u70b9\uff0c\u5982\u56fe3\u6240\u793a\u3002A\u3001B\u95f4\u7535\u52bf\u5dee\u4e3aU\uff0c\u82e5\u6746\u7ed5\u4e2d\u95f4O\u70b9\u8f6c180\u00b0\uff0c\u5219\u6b64\u8fc7\u7a0b\u7535\u573a\u529b\u7684\u529f\u4e3a( )
A.\u7535\u573a\u529b\u4e0d\u505a\u529f
B.\u7535\u573a\u529b\u505a\u529f\u4e3aqU\uff0c\u7535\u52bf\u80fd\u51cf\u5c11qU
C.\u7535\u573a\u529b\u505a\u529f\u4e3a2qU\uff0c\u7535\u52bf\u80fd\u51cf\u5c112qU
D.\u514b\u670d\u7535\u573a\u529b\u505a\u529f\u4e3a2qU\uff0c\u7535\u52bf\u80fd\u589e\u52a02qU
3.\u4e00\u4e2a\u7535\u5bb9\u5668\u5e26\u7535\u91cf\u4e3aQ\u65f6\uff0c\u4e24\u6781\u677f\u95f4\u7684\u7535\u538b\u4e3aU\uff0c\u4e0b\u8ff0\u53d9\u8ff0\u4e2d\u9519\u8bef\u7684\u662f( )
A.\u82e5\u5b83\u5e26\u7535\u91cf\u51cf\u534a\uff0c\u5219\u5b83\u7684\u7535\u5bb9\u51cf\u534a\uff0c\u4e24\u677f\u7535\u538b\u4e0d\u53d8
B.\u82e5\u5b83\u5e26\u7535\u91cf\u51cf\u534a\uff0c\u5219\u5b83\u7684\u7535\u5bb9\u4e0d\u53d8\uff0c\u4e24\u677f\u7684\u7535\u538b\u51cf\u534a
C.\u82e5\u5b83\u5e26\u7535\u91cf\u4e3a0\uff0c\u5219\u5b83\u7684\u7535\u5bb9\u4e0d\u53d8\uff0c\u4e24\u677f\u7535\u538b\u4e3a0
D.\u82e5\u5b83\u7684\u5e26\u7535\u91cf\u52a0\u500d\uff0c\u5219\u5b83\u7684\u7535\u5bb9\u4e0d\u53d8\uff0c\u4e24\u677f\u7535\u538b\u52a0\u500d
4.\u5df2\u77e5\u70b9\u7535\u8377A\u7684\u7535\u91cf\u662f\u70b9\u7535\u8377B\u76842\u500d\uff0c\u5219A\u5bf9B\u4f5c\u7528\u529b\u5927\u5c0f\u8ddfB\u5bf9A\u4f5c\u7528\u529b\u5927\u5c0f\u6bd4\u503c\u4e3a \uff0c\u82e5\u628a\u6bcf\u4e2a\u7535\u8377\u7535\u91cf\u90fd\u51cf\u5c11\u4e00\u534a\uff0c\u5219A\u5bf9B\u4f5c\u7528\u529b\u4e3a\u539f\u6765\u7684 \u500d\u3002
5.\u6709\u4e00\u5e26\u7535\u91cf\u662fq=\uff0d2\u00d710\uff0d6C\u7684\u70b9\u7535\u8377\uff0c\u5728\u7535\u573a\u4e2dA\u70b9\u79fb\u5230B\u70b9\uff0c\u7535\u573a\u529b\u505a6\u00d710\uff0d4J\u7684\u8d1f\u529f\uff0c\u4eceB\u79fb\u5230C\u7535\u573a\u529b\u505a8\u00d710\uff0d4J\u6b63\u529f\uff0c\u6c42AB\u3001BC\u3001CA\u95f4\u7535\u52bf\u5dee\u5404\u662f\u591a\u5c11\uff1f
6.\u4e00\u4e2a\u7535\u5bb9\u5668\uff0c\u5f53\u5e26\u7684\u7535\u91cf\u589e\u52a05.1\u00d710\uff0d8C\u65f6\uff0c\u4e24\u6781\u677f\u7535\u52bf\u5dee\u589e\u52a0300V\u3002\u5219\u8fd9\u4e2a\u7535\u5bb9\u7684\u7535\u5bb9\u662f \u3002\u5982\u679c\u4f7f\u5176\u4e2d\u4e00\u677f\u5e26\u7684\u7535\u91cf\u51cf\u4e3a\u539f\u6765\u7684 \uff0c\u8fd9\u4e2a\u7535\u5bb9\u5668\u7684\u7535\u5bb9\u5c06\u662f \u3002
\u3010\u53c2\u8003\u7b54\u6848\u3011
1. C 2. C 3. A 4. 1,
1.[感应电动势的大小计算公式]
1)E=nΔΦ/Δt(普适公式){法拉第电磁感应定律,E:感应电动势(V),n:感应线圈匝数,ΔΦ/Δt:磁通量的变化率}
2)E=BLV垂(切割磁感线运动) {L:有效长度(m)}
3)Em=nBSω(交流发电机最大的感应电动势) {Em:感应电动势峰值}
4)E=BL2ω/2(导体一端固定以ω旋转切割) {ω:角速度(rad/s),V:速度(m/s)}
2.磁通量Φ=BS {Φ:磁通量(Wb),B:匀强磁场的磁感应强度(T),S:正对面积(m2)}
3.感应电动势的正负极可利用感应电流方向判定{电源内部的电流方向:由负极流向正极}
*4.自感电动势E自=nΔΦ/Δt=LΔI/Δt{L:自感系数(H)(线圈L有铁芯比无铁芯时要大),
ΔI:变化电流,?t:所用时间,ΔI/Δt:自感电流变化率(变化的快慢)}
注:(1)感应电流的方向可用楞次定律或右手定则判定,楞次定律应用要点;
(2)自感电流总是阻碍引起自感电动势的电流的变化;(3)单位换算:1H=103mH=106μH。
(4)其它相关内容:自感/日光灯。
十、交变电流(正弦式交变电流)
1.电压瞬时值e=Emsinωt 电流瞬时值i=Imsinωt;(ω=2πf)
2.电动势峰值Em=nBSω=2BLv 电流峰值(纯电阻电路中)Im=Em/R总
3.正(余)弦式交变电流有效值:E=Em/(2)1/2;U=Um/(2)1/2 ;I=Im/(2)1/2
4.理想变压器原副线圈中的电压与电流及功率关系
U1/U2=n1/n2; I1/I2=n2/n2; P入=P出
5.在远距离输电中,采用高压输送电能可以减少电能在输电线上的损失损′=(P/U)2R;
(P损′:输电线上损失的功率,P:输送电能的总功率,U:输送电压,R:输电线电阻);
6.公式1、2、3、4中物理量及单位:ω:角频率(rad/s);t:时间(s);n:线圈匝数;B:磁感强度(T);
S:线圈的面积(m2);U输出)电压(V);I:电流强度(A);P:功率(W)。
注:(1)交变电流的变化频率与发电机中线圈的转动的频率相同即:ω电=ω线,f电=f线;
(2)发电机中,线圈在中性面位置磁通量最大,感应电动势为零,过中性面电流方向就改变;
(3)有效值是根据电流热效应定义的,没有特别说明的交流数值都指有效值;
(4)理想变压器的匝数比一定时,输出电压由输入电压决定,输入电流由输出电流决定,输入功率等于输出功率,
当负载的消耗的功率增大时输入功率也增大,即P出决定P入;
(5)其它相关内容:正弦交流电图象/电阻、电感和电容对交变电流的作用。
直接百度
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