(a) State the condition under which the phenomenon of resonance occurs in a series LCR circuit. Plot a graph showing the variation of current with frequency of a.c. sources in a series LCR circuit. (b) Show that in a series LCR circuit connected to an a.c. source exhibits resonance at its natural frequency equal to 1 /√ LC.
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Kindly post you queries in different threads to get the answers of all the queries.
Refer to the links given below to get the answer of the first question.
https://www.meritnation.com/ask-answer/question/what-are-the-conditions-for-resonance-in-lcr-circuit/alternating-current/1728857
https://www.meritnation.com/ask-answer/question/could-u-plzz-give-the-answers-to-these-4qs-by-tomorro/alternating-current/2898324
Hope this information will clear your doubts about the topic.
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.