<p>In the RL-circuit shown in fig. 7.23, resistance R = 30<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>&#937;</mi></math>, resistance&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>X</mi><mi>L</mi></msub><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mn>40</mn><mi>&#937;</mi></math>&nbsp;and peak emf = 220V.</p>

<p><img alt="" src="https://school.achievam.com/upload/questionbank/question/que_1758698798.png" style="height:120px; width:131px" /></p>

<p>Calculate the (i) impedance Z, (ii) phase difference between the emf and current and (iii) the peak current&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>I</mi><mn>0</mn></msub></math>&nbsp;in the circuit</p>