<p>Figure 7.36 shows series LC circuit with L = 5.0 H, C = 80&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>&#956;</mi></math>F, R = 40<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>&#937;</mi></math>&nbsp;connected to a variable frequency 240V source. Calculate.</p>

<p><img alt="" src="https://school.achievam.com/upload/questionbank/question/que_1758765376.PNG" style="height:113px; width:151px" />Fig 7.36</p>

<p>(i) the angular frequency of the source which derives the circuit at resonance.</p>

<p>(ii) the current at the resonating frequency</p>

<p>(iii) the rms potential drop across the capacitor at resonance.</p>