A.\(\ell  = \frac{\lambda }{3}\)
B.\(\ell  = {\lambda ^2}\)
C.\(\ell  = \frac{\lambda }{4}\)
D.\(\ell  = \frac{\lambda }{2}\)

A.Tần số
B.Chu kì
C.Vận tốc truyền sóng
D.Bước sóng

A.\(4\Delta t\)
B.\(6\Delta t\)
C.\(3\Delta t\)
D.\(12\Delta t\)

A.0,96m.
B.1,6m.
C.2,24m.
D.2,28m.

A.ngược pha với nhau.
B.cùng pha nhau.
C.lệch pha nhau một góc \({60^0}\).
D.vuông pha với nhau.

A.\(100\Omega \)
B.\(200\Omega \)
C.\(50\Omega \)
D.150\(\Omega \)

A.\(\frac{1}{{160}}\left( s \right)\).
B.\(\frac{1}{{180}}\left( s \right)\).
C.\(\frac{1}{{240}}\left( s \right)\).
D.\(\frac{1}{{90}}\left( s \right)\).

A.\(\lambda  = vT\)
B.\(\lambda  = 2\pi vT\)
C.\(\lambda  = \frac{v}{T}\)
D.\(\lambda  = \frac{v}{{2\pi T}}\)

A.\(\frac{{{u^2}}}{{{U^2}}} + \frac{{{i^2}}}{{{I^2}}} = \frac{1}{4}\)
B.\(\frac{{{u^2}}}{{{U^2}}} + \frac{{{i^2}}}{{{I^2}}} = 1\)
C.\(\frac{{{u^2}}}{{{U^2}}} + \frac{{{i^2}}}{{{I^2}}} = 2\)
D.\(\frac{{{u^2}}}{{{U^2}}} + \frac{{{i^2}}}{{{I^2}}} = \frac{1}{2}\).

A.\({A_{MN}} = q\left( {{V_M} - {V_N}} \right)\)
B.\({A_{MN}} = \frac{{{V_M} - {V_N}}}{q}\)
C.\({A_{MN}} = \frac{q}{{{V_M} - {V_N}}}\)
D.\({A_{MN}} = q\left( {{V_M} + {V_N}} \right)\)