已知如图所示电路中晶体管的b=100,[img=89x22]1803b4c5846392f.png[/img],[img=86x25]1803b4c58c45b43.png[/img],各电容足够大,对交流信号可视为短路。计算负载电阻[img=23x22]1803b4c593ffe7c.png[/img]不接时的电压放大倍数[img=85x25]1803b4c59b88366.png[/img]和[img=92x22]1803b4c5a3df350.png[/img]时的电压放大倍数[img=85x25]1803b4c59b88366.png[/img]各为__________。[img=276x240]1803b4c5b64af95.png[/img]
A: 0.996,0.498
B: 0.996,0.992
C: -0.996,-0.498
D: -0.996,-0.992
A: 0.996,0.498
B: 0.996,0.992
C: -0.996,-0.498
D: -0.996,-0.992
举一反三
- 求不定积分[img=121x54]17da653839aa6ae.png[/img]; ( ) A: log(x^2 + 3*x + 25/4)/4 + (5*atan(x/2 + 3/4))/4 B: log(x^2 + 3*x + 25/4)/4 C: (5*atan(x/2 + 3/4))/4 D: log(x^2 + 3*x + 25/4)/4 - (5*atan(x/2 + 3/4))/4
- 如图所示电路电压放大倍数是( )。[img=307x209]1802f435135edbc.png[/img] A: 5 B: -5 C: 4 D: -4
- 如图所示电路电压放大倍数是( )。[img=307x209]1802f434918f798.png[/img] A: 5 B: -5 C: 4 D: -4
- 如图所示电路电压放大倍数是( )。[img=307x209]1802e134c1b8efe.png[/img] A: 5 B: -5 C: 4 D: -4
- 如图所示电路电压放大倍数是( )。[img=307x209]180384e84ccc6af.png[/img] A: 5 B: -5 C: 4 D: -4