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Series LCR: Impedance and Phase for JEE: 20 solved questions

Real JEE paper questions on series lcr: impedance and phase, part of alternating current. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2004 to 2026. No sign-in needed to read them.

What this topic asks

• Impedance and phase angle — 10 questions
• Voltages across the elements — 5 questions
• Current in a series LCR — 5 questions

All 20 questions with solutions

• The figure shows an LCR series circuit with two switches S₁ and S₂, a capacitor C=100 μF, a resistor R and tw… JEE Main 2nd April 2nd Shift 2026
• A series LCR circuit is fed by a 200 V, 50 Hz a.c. signal. If the voltage across the inductor (L=10 mH) is 31… JEE Main 5th April 2nd Shift 2024
• A coil of negligible resistance is in series with a 90 Ω resistor across a 120 V, 60 Hz supply. A voltmeter r… JEE Main 8th April 2nd Shift 2024
• In a series circuit X_L=200 Ω, X_C=100 Ω and R=100 Ω with Vᵣₘₛ=200√2 V. The r.m.s. current through the resist… JEE Main 30th Jan 2nd Shift 2023
• An element X across an a.c. supply of peak voltage 100 V gives a peak current of 5 A in phase with the voltag… JEE Main 29th July 2nd Shift 2022
• A voltage V(t)=210 sin(3000t) V is applied to a series LCR circuit with L=10 mH, C=25 μF and R=100 Ω. The pha… JEE Main 25th June 2nd Shift 2022
• In an a.c. circuit an inductor, a capacitor and a resistor are in series with X_L=R=X_C. The impedance of thi… JEE Main 31st Aug 1st Shift 2021
• A series LCR circuit with R=100 Ω, L=0.5 mH and C=0.1 pF is connected across a 220 V--50 Hz a.c. supply. The… JEE Main 20th July 2nd Shift 2021
• A 0.07 H inductor and a 12 Ω resistor are in series across a 220 V, 50 Hz a.c. source. The current and the ph… JEE Main 27th July 1st Shift 2021
• The angular frequency of the alternating current in an LCR circuit is 100 rad/s. From the figure the voltage… JEE Main 25th Feb 1st Shift 2021
• A circuit fed by e=e₀ sin(100t) (t in seconds) shows a phase difference of π/4 between emf and current. Which… JEE Main 8th April 2nd Shift 2019
• A sinusoidal voltage of peak 283 V and angular frequency 320 s⁻¹ is applied to a series LCR circuit with R=5… JEE Main Online 2017
• In a series LCR circuit the r.m.s. voltages satisfy V_L:V_C:V_R=1:2:3. If the source r.m.s. voltage is 100 V,… JEE Main Online 2014
• In a series LCR a.c. circuit the voltage across each of L, C and R is 50 V. The voltage across the L-C combin… AIEEE 2004
• An inductor of 10 mH, a capacitor of 0.1 μF and a resistor of 100 Ω are in series across a 220 V, 70 Hz suppl… JEE Main 4th April 1st Shift 2026
• An inductor of 1 H is in series with a resistor of 100π Ω across a 100π V, 50 Hz a.c. supply. The maximum cur… JEE Main 4th April 2nd Shift 2025
• A series LCR circuit has R=80 Ω, X_L=100 Ω and X_C=40 Ω. The input voltage is 2500 cos(100π t) V. The current… JEE Main 31st Jan 2nd Shift 2023
• To light a 50 W, 100 V lamp it is placed in series with a capacitor of capacitance (50)/(π√x) μF across a 200… JEE Main 27th July 1st Shift 2022
• A series LCR circuit has L=100 mH, C=100 μF and R=10 Ω across a 220 V, 50 Hz source. The approximate current… JEE Main 25th June 2nd Shift 2022
• A series LCR circuit has an inductor 30 mH and a resistor 1 Ω across an a.c. source of angular frequency 300… JEE Main 20th July 1st Shift 2021