If the rms current in a 50 Hz AC circuit is 5 A, the value of the current 1/300 s after its value becomes zero is

(a) 5 $\sqrt[]{2}\mathit{A}$   

(b) 5 $\frac{\sqrt[]{3}}{2}$ A           

(c) 5/6A         

(d) 5/ $\sqrt[]{2}$ A

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A coil has resistance of 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an ac source of 200 V, 100 Hz is connected across the coil, current in coil will be

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