Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • The figure shows a series LCR circuit connected to a variable frequency 230 V source. (a) Determine the source freque

The figure shows a series LCR circuit connected to a variable frequency 230 V source.

(a) Determine the source frequency which drives the circuit in resonance.

(b) Calculate the impedance of the circuit and amplitude of current at resonance.

(c) Show that potential drop across LC combination is zero at resonating frequency.

 

 
 
 
 
 

Answers (1)

(a) Determining the source frequency (w)

We know, w=\frac{1}{\sqrt{LC}}=\frac{1}{\sqrt{5\times 80\times 10^{-6}}}=\frac{1}{\sqrt{400\times 10^{-6}}}

                w=\frac{1000}{20}=50Hz

(b) Calculating the impedance of the given circuit and amplitude of current at resonance.

At resonance  Z=R=40\; \Omega

I^{max}_{m}=\frac{230\sqrt{2}}{R}=\frac{230\sqrt{2}}{40}=8.1\; A

(c) the potential drop across L and C,

At resonance 

X_{C}=X_{L}

iX_{C}=iX_{L}

implies that 

V_{C}=V_{L}

V_{C}-V_{L}=0     

Posted by

Safeer PP

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE Board exams twice a year from 2025, no plan for semesters: MoE
anam-khan

CBSE Class 12 board exams 2025 to have 50% competency-based questions; no change in 10th
anam-khan

CBSE Class 12 board exams 2024 over; expected result date, trends of last 10 years

Latest Question