a b c d

b

Inductive reactance $X_L = \omega L = 2\pi fL = 2\times \pi \times 0.5 \times 50 = 157 \Omega$ Impedance $Z = \sqrt(R^2 + X_L^2) = 191 \Omega$ $ I = \frac{E}{Z} = \frac{100 V}{191 \Omega} = 0.52 A$