Phương pháp sử dụng giản đồ vectơ Frenen trong điệ...

A \({u_{MN}} = 125\sqrt 2 \cos (100\pi t + {\pi  \over 2})\,V\)

B \({u_{MN}} = 75\sqrt 2 \cos (100\pi t + {{2\pi } \over 3})\,V\)

C \({u_{MN}} = 75\sqrt 2 \cos (100\pi t + {\pi  \over 2})\,V\)

D \({u_{MN}} = 125\sqrt 2 \cos (100\pi t + {\pi  \over 3})\,V\)

A \(i = 0,5\sqrt 2 c{\rm{os}}\left( {\omega t - {\pi  \over 6}} \right)A\)

B \(i = 0,5\sqrt 2 c{\rm{os}}\left( {\omega t - {\pi  \over 3}} \right)A\)

C \(i = 0,5\sqrt 2 c{\rm{os}}\left( {\omega t - {\pi  \over 2}} \right)A\)

D \(i = 0,5\sqrt 2 c{\rm{os}}\left( {\omega t + {\pi  \over 6}} \right)A\)

A \( {u_R} =120\sqrt 3 (V)\); \( {u_C} =  - 60(V)\)

B \( {u_R} =120\sqrt 3 (V)\); \( {u_C} =  - 80(V)\)

C \( {u_R} =100\sqrt 3 (V)\); \( {u_C} =  - 60(V)\)

D \( {u_R} =120 (V)\); \( {u_C} =  - 60(V)\)

A \({U_{AB}} = 75(V)\)

B \({U_{AB}} = 72,11(V)\)

C \({U_{AB}} = 62,11(V)\)

D \({U_{AB}} = 80(V)\)

A 220\(\sqrt2\)V.  

B 220/\(\sqrt3\)V.  

C 220 V.  

D 110 V.

A 3\(\sqrt3\) (A) 

B 3 (A) 

C 4 (A) 

D \(\sqrt2\) (A) 

A 150V.  

B 100V.  

C \(50\sqrt7 V\)

D \(100\sqrt3 V\)

A 100 V.  

B 100\(\sqrt2\) V.  

C 100\(\sqrt3\) V.  

D 120 V.  

A  200V  

B 125V 

C 275V 

D 180V

A C =15,4μF.

B C = 20μF.

C C =30μF.

D C = 25,4μF.

A 2/π (H).

B 1/π (H).

C \(\sqrt3\)/π (H).

D 3/π (H).

A R=120 Ω; r = 60 Ω   

B R=60 Ω ; r=30 Ω  ;        

C R=60 Ω ; r=120 Ω 

D  R=30 Ω ; r=60 Ω

A 15Ω   

B  25Ω     

C  20Ω     

D 40Ω

A 0,37H  

B  0,58H

C 0,68H  

D 0,47H

A 150 W.

B 20 W.

C 90 W.

D 100 W.

A 50W

B 30W

C 40W

D 20W

A 0,866  

B 0,975

C 0,755

D 0,887

A \(50\sqrt 2 (W).\)

B \({{125\sqrt 6 } \over 4}(W).\)

C \(25\sqrt 6 (W).\)

D \(50\sqrt 6 (W).\)