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.\({A_{MN}} = q\left( {{V_M} + {V_N}} \right)\)

A.chậm dần.
B.chậm dần đều.
C.nhanh dần.
D.nhanh dần đều.

A.\(220\sqrt 2 W\)
B.440W
C.\(440\sqrt 2 W\)
D.220W