question_answer

In an L-R circuit, the value of L is \[(0.4/\pi )\]henry and the value of R is 30 ohm. If in the circuit, an alternating emfof200 volt at 50 cycles per second is connected, the impedance of the circuit and current will be:

A) 11.4 ohm, 17.5 ampere

B) 30.7 ohm, 6.5 ampere

C) 40.4 ohm, 5 ampere

D) 50 ohm, 4 ampere.