In an $LR$ circuit,the value of $L$ is $(\frac{0.3}{\pi}) \ H$ and the value of $R$ is $40 \ \Omega$. If an alternating e.m.f. of $230 \ V$ at $50 \ Hz$ is connected to the circuit,what are the impedance and the current in the circuit,respectively?
- A$12.5 \ \Omega, 9.2 \ A$
- B$46.4 \ \Omega, 6.4 \ A$
- C$23.2 \ \Omega, 5 \ A$
- D$50 \ \Omega, 4.6 \ A$
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