Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Alternating Current question

2001 · Q134
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Alternating Current
  5. /2001 · Q134

Alternating Current question

2001 · Q134

NEETPhysicsAlternating CurrentMultiple correct+4 / −1
The value of quality factor is
  1. A
    ωRL{{\omega R} \over L}LωR​
  2. B
    1ωRC{1 \over {\omega RC}}ωRC1​
  3. C
    LC\sqrt {LC}LC​
  4. D
    L/RL/RL/R
View written solutionFree

Correct answer: B

Quality factor Q = ωLR{{\omega L} \over R}RωL​

As ω2=1LC{\omega ^2} = {1 \over {LC}}ω2=LC1​

∴\therefore∴ Q = 1ωRC{1 \over {\omega RC}}ωRC1​

Previous

More from Alternating Current

  • To an ac power supply of 220 V at 50 Hz , a resistor of 20Ω, a capacitor of reactance 25Ω and an inductor of reactance 45Ω are connected in series. The corresponding current in the circuit and the phase angle…2025 · MCQ
  • In an ideal transformer, the turns ratio is NS​NP​​=21​. The ratio VS​:VP​ is equal to (the symbols carry their usual meaning) :2024 · MCQ
  • A 10μF capacitor is connected to a 210 V,50 Hz source as shown in figure. The peak current in the circuit is nearly (π=3.14) : Includes diagram2024 · MCQ
  • In the circuit shown below, the inductance L is connected to an ac source. The current flowing in the circuit is I=I0​sinωt. The voltage drop (VL​) across L is Includes diagram2024 · MCQ
  • A step up transformer is connected to an ac mains supply of 220 V to operate at 11000 V,88 watt. The current in the secondary circuit, ignoring the power loss in the transformer, is2024 · MCQ
  • The amplitude of the charge oscillating in a circuit decreases exponentially as Q=Q0​e−Rt/2L, where Q0​ is the charge at t=0 s. The time at which charge amplitude decreases to 0.50Q0​ is nearly: [Given that R=1.5Ω,L=12 mH,ln(2)=0.693…2024 · MCQ
  • An ac source is connected in the given circuit. The value of ϕ will be : Includes diagram2023 · MCQ
  • If Z1​ and Z2​ are the impedances of the given circuits (a) and (b) as shown in figures, then choose the correct option Includes diagram2023 · MCQ