Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Alternating Current question

2025 · 22 Jan · Shift 2 · Q62
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Alternating Current
  5. /2025 · 22 Jan · Shift 2 · Q62

Alternating Current question

2025 · 22 Jan · Shift 2 · Q62

JEE MainPhysicsAlternating CurrentMCQ+4 / −1
A series LCR circuit is connected to an alternating source of emf E. The current amplitude at resonant frequency is I0I_0I0​. If the value of resistance R becomes twice of its initial value then amplitude of current at resonance will be
  1. A
    I02\frac{\mathrm{I}_0}{2}2I0​​
  2. B
    I02\frac{\mathrm{I}_0}{\sqrt{2}}2​I0​​
  3. C
    2I02 \mathrm{I}_02I0​
  4. D
    I0\mathrm{I_0}I0​
PreviousNext

More from Alternating Current

  • In a series LCR circuit, a resistor of 300Ω, a capacitor of 25 nF and an inductor of 100 mH are used. For maximum current in the circuit, the angular frequency of the ac source is ​×104 radians s−1…2025 · Numerical
  • An alternating current is given by I=IA​sinωt+IB​cosωt. The r.m.s current will be2025 · MCQ
  • A parallel plate capacitor has a capacitance C=200 pF. It is connected to 230 V ac supply with an angular frequency 300 rad/s. The rms value of conduction current in the circuit and…2024 · MCQ
  • In series LCR circuit, the capacitance is changed from C to 4C. To keep the resonance frequency unchanged, the new inductance should be:2024 · MCQ
  • In an ac circuit, the instantaneous current is zero, when the instantaneous voltage is maximum. In this case, the source may be connected to : A. pure inductor. B. pure capacitor. C. pure resistor. D. combination of an inductor and…2024 · MCQ
  • A alternating current at any instant is given by i=[6+56​sin(100πt+π/3)] A. The rms value of the current is ​ A.2024 · Numerical
  • Match List I with List II Choose the correct answer from the options given below: Includes table Includes diagram2024 · MCQ
  • An alternating voltage of amplitude 40 V and frequency 4 kHz is applied directly across the capacitor of 12μF. The maximum displacement current between the plates of the capacitor is nearly :2024 · MCQ