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

A.\(i = \frac{{\lambda D}}{a}\)
B.\(i = \frac{{\lambda a}}{D}\)
C.\(i = \lambda Da\)
D.\(i = \frac{\lambda }{{aD}}\)

A.\({x^{15}}\)
B.\({x^{\frac{3}{5}}}\)
C.\({x^8}\)
D.\({x^{\frac{5}{3}}}\)

A.\(\dfrac{{8{a^3}}}{3}\)
B.\(\dfrac{{8\sqrt 2 {a^3}}}{3}\)
C.\(\dfrac{{2\sqrt 2 {a^3}}}{3}\)
D.\(\dfrac{{\sqrt 2 {a^3}}}{3}\)

A.\(m > 6\)
B.\(m < 6\)
C.\(m \ge 6\)
D.\(m \le 6\)

A.\(\dfrac{{13\sqrt {14} }}{{14}}\)
B.\(\sqrt {14} \)
C.\(\dfrac{{12}}{7}\)
D.\(\dfrac{{18}}{7}\)