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Resonance in Series LCR for GUJCET: 21 solved questions

Real GUJCET paper questions on resonance in series lcr, part of alternating current. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2007 to 2025. No sign-in needed to read them.

What this topic asks

• Power and bandwidth at resonance — 11 questions
• Resonance condition and tuning — 9 questions
• Current and voltage at resonance — 1 question

All 21 questions with solutions

• The resonance frequency of an LCR series A.C. circuit is f₀. Now the capacitance is made 4 times; then the ne… GUJCET 2007
• In a series resonant circuit, the A.C. voltages across the resistance R, the inductor L and the capacitor C a… GUJCET 2009
• For an L-C-R A.C. circuit the resonance frequency is 5000 Hz and the frequencies at the half-power points are… GUJCET 2016
• For an A.C. L-C-R series circuit at the resonant frequency, which of the following is wrong? GUJCET 2016
• In an L-C-R A.C. series circuit, L = 9 H, R = 10 Ω and C = 100 μF. Hence the Q-factor of the circuit is . GUJCET 2019
• A sine voltage having a maximum value of 283 V and frequency 50 Hz is applied to an LCR series connection whe… GUJCET 2020
• For an LCR a.c. series circuit, L = 25 mH, R = 3 Ω and C = 62.5 μF. What is the frequency of the source at wh… GUJCET 2021
• For a series LCR circuit with L=2 H, C=18 μF and R=10 Ω, what is the value of the Q-factor of this circuit? GUJCET 2021
• In which of the following AC circuit, we get the value of power factor 1 at resonance condition? GUJCET 2025
• Resonant angular frequency for an L-C-R A.C. series circuit is ω₀ = . GSEB Board July 2015
• For an L-C-R A.C. circuit the resonant frequency is 600 Hz and the frequencies at the half-power points are 5… GSEB Board July 2015
• The value of the Q-factor in an L-C-R (AC) series circuit is _. GSEB Board July 2016
• For an L-C-R A.C. circuit the resonance frequency is 600 Hz and the frequencies at the half-power points are… GSEB Board March 2018
• For an L-C-R A.C. circuit the resonance frequency is 500 Hz and the frequencies at the half-power points are… GSEB Board July 2018
• For an LCR series circuit, L = 2.0 H, C = 32 μF and R = 10 Ω. is the Q value for this circuit. GSEB Board August 2020
• The formula of the Q-factor (quality factor) is Q= _. GSEB Board July 2021
• Q-factor is given by . GSEB Board July 2022
• Which of the following combinations should be selected for better tuning of an LCR a.c. circuit used for comm… GSEB Board March 2023
• When does the impedance of a series L–C–R (AC) circuit become minimum? RS Academy GUJCET booklet
• The value of the Q-factor in an L–C–R series circuit is ........... RS Academy GUJCET booklet
• The resonance frequency of an L–C–R AC series circuit is f₀= ......... RS Academy GUJCET booklet