A.5
B.6
C.4
D.3

A.6,25λ.
B.6,65λ.
C.6,80λ.
D.6,40λ.

A.\({e_1} + {e_2} + 2{e_3} = 0\).
B.\({e_1} + {e_2} = {e_3}\).
C.\({e_1} + {e_2} + {e_3} = 0\).
D.\(2{e_1} + 2{e_2} = {e_3}\).

A.\(40\Omega \)
B.\(100\Omega \)
C.\(50\Omega \)
D.\(60\Omega \)

A.Giảm 20%.
B.Tăng 20%.
C.Giảm 9,54%.
D.Tăng 9,54%.

A.\(2,45A;{\rm{ }}13V\)
B.\(2,5A;{\rm{ }}12,25V\)
C.\(2,45A;{\rm{ }}12,25V\)
D.\(3,75A;{\rm{ }}12,5V\)

A.\(\dfrac{\pi }{2}\)
B.\(2\pi \)
C.\(\pi \)
D.\(\dfrac{\pi }{4}\)

A.5 hoặc 1.
B.4 hoặc 2.
C.3 hoặc 1.
D.4 hoặc 3.

A.1837
B.1839
C.1840
D.1845

A.1837
B.1839
C.1840
D.1845