Q1PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
Ratio of impedance to capacitive
reactance has
Physics · JEE
Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current Concepts for JEE
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Master Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.
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Concept explainer
Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current is a core JEE Main Physics subtopic under Electromagnetic Induction and Alternating Currents. Master the definitions, standard results, and typical MCQ patterns tested in JEE Main and Advanced.
Key points
- Understand the definition and scope of Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current in the JEE syllabus
- Memorise key formulas and standard results linked to Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current
- Practise 20–40 syllabus-aligned MCQs with step-by-step solutions
JEE tips
- Revise Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current with a one-page formula sheet before attempting mixed tests
- After each practice set, log mistakes specific to Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current and reattempt after 48 hours
Common trap
Students often rush Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.
Syllabus context
Part of Electromagnetic Induction and Alternating Currents in JEE Main Physics.
- Electromagnetic induction: Faraday's law, induced emf and current, Lenz's law, eddy currents, self and mutual inductance
- Alternating currents, peak and RMS value of alternating current/voltage
- Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current
- AC generator and transformer
Free sample questions
Attempt 8 free MCQs for Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current. Unlock 13+ more with Pro.
Q2PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
The power loss in an circuit is
when in the circuit there is only
Q3PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
Assertion
In series circuit, current
and voltage are in same phase at
resonance.
Reason
In series circuit,
resonant frequency does not depend on the value of resistance. Hence current,
at resonance, does not depend on
resistance.
Q4PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
The current flowing through the resistor
in a series LCR a.c. circuit, is
Now the inductor and capacitor are
connected in parallel and joined in series with the resistor as shown in
figure. The current in the circuit is now.
(Symbols have their usual meaning)
Q5PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
In series LCR circuit and
impedance is . An r.m.s. voltage
is applied across the circuit. The true power consumed in a.c. circuit is
Q6PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
For filtering low frequency noise out of a signal the circuit can be built by just putting resistor and capacitor in
Q7PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
If we change the value of , then
Q8PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
The inductive reactance of a choke coil
of in an circuit of will be
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Popular questions in Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current
- The inductive reactance of a choke coil of \( 1 / 4 \pi m H \) in an \( A C \) circuit of \( 50 H z \) will be…
- In series LCR circuit \( R=18 \Omega \) and impedance is \( 33 \Omega \). An r.m.s. voltage \( 220 V \) is applied acros…
- A circuit consists of a resistor,an inductor and a capacitor connected in series. If the resistance of a resistor is \( …
- The inductive reactance of a choke coil of \( 1 / 4 \pi m H \) in an \( A C \) circuit of \( 50 H z \) will be…
- With increase in frequency of an A.C. supply, the inductive reactance…
- Assertion A capacitor blocks direct current in the steady state. Reason The capacitive reactance of the capacitor is inv…
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