<p>An a.c source of 100 V r.m.s, 50 Hz is connected across a 20<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>&#937;</mi></math>&nbsp;resistor and 2 mH inductor in series. Calculate (i) impedance of the circuit and (ii) r.m.s current in the circuit.</p>