A.\(I = U\sqrt {{R^2} + {\omega ^2}L} .\)
B.\(I = \dfrac{U}{{R + \omega L}}.\)
C.\(I = \dfrac{U}{{\sqrt {{R^2} + {\omega ^2}{L^2}} }}.\)
D.\(I = \dfrac{{{U_0}}}{{\sqrt {{R^2} + {\omega ^2}{L^2}} }}.\)

A.\(\omega  = \dfrac{{{E_0}}}{{{\Phi _0}}}.\)
B.\(\omega  = {E_0}{\Phi _0}.\)
C.\(\omega  = \dfrac{{{\Phi _0}}}{{{E_0}}}.\)
D.\(\omega  = \dfrac{1}{{\sqrt {{\Phi _0}{E_0}} }}.\)

A.2,5cm.
B.5cm.
C.5mm.
D.0

A.\(90\,\,\Omega \).
B.\(150\,\,\Omega \).
C.\(250\,\,\Omega \).
D.\(1300\,\,\Omega \).

A.L, P, X.
B.L, P, Z.
C.M, P, Z.
D.N, Q, X.

A.0,66 m.
B.1,5 m.
C.6,6 m.
D.500 m.

A.Not only did I realize that I had forgotten to put a stamp on the letter but I posted it as well.
B.Scarcely had I posted the letter when I realized that I had forgotten to put on a stamp.
C.No sooner had I posted the letter than I forgot to put on a stamp.
D.Only before posting the letter did I realize that I had forgotten to put on a stamp.

A.Had you performed better in the interview, I didn't feel sorry for you.
B.I wish you performed better in the interview.
C.I regret that you couldn't have performed better in the interview.
D.I wish you had performed better in the interview.

A.Had you performed better in the interview, I didn't feel sorry for you.
B.I wish you performed better in the interview.
C.I regret that you couldn't have performed better in the interview.
D.I wish you had performed better in the interview.

A.You ought to have handed in this assignment two days ago.
B.You must have handed in this assignment two days ago.
C.You should have been supposed to hand in this assignment two days ago.
D.You may have handed in this assignment two days ago.