an LCR series circuit with L = 100 mH , c= 100 uF , R = 120 ohm is connected an ac source of emf E = 30 sin 100 t volt . find the impedance , peak currrent and resonant frequency of the circuit .

Dear Student ,
Here is a link given below which will help you to solve this question with proper explanation .
https://www.meritnation.com/ask-answer/question/an-lcr-series-circuit-has-r-100-ohms-l-0-5-h-c-100am-2f/current-electricity/8934959


To find the resonant frequency use the equation :

f=R2+ωL-1ωC2

Hope this helps you .
Regards

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