TestUstad

The value of quality factor is:

Correct answer: A. ωL/R

  • A. ωL/R
  • B. 1/ωRC
  • C. √LC
  • D. L/R

Explanation

The quality factor, or Q-factor, of an RLC circuit is a dimensionless parameter that describes how underdamped the circuit is and its bandwidth relative to its center frequency. The correct formula is Q = ωL/R, where ω is the angular frequency, L is the inductance, and R is the resistance. This option correctly reflects the dependency of the quality factor on these parameters. Option B (1/ωRC) is incorrect because it pertains to the time constant in an RC circuit, not the quality factor. Option C (√LC) is incorrect because it represents the resonant frequency of an LC circuit. Option D (L/R) is incorrect because it omits the angular frequency, which is crucial in the formula for the quality factor.

Written and checked by , contributorLast updated
Report an error

The more specific you are, the faster it gets fixed. A source beats an opinion.

Prefer email? [email protected]

About Alternating Current

Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.

Practise Alternating Current

592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Start a free Alternating Current testAll Alternating Current MCQs

Discussion

Stuck on an option, or know a faster way to get there? Ask or explain it here.

No comments yet. Be the first to explain this one.

Exams that ask Physics questions like this

Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

Lecturer Physics Test Physics80 MCQsSubject Specialist Physics Test Physics80 MCQsNET Physics60 MCQsNUMS Physics40 MCQsDUHS Physics36 MCQsETEA MDCAT Physics36 MCQsKMU Physics36 MCQsMDCAT Physics36 MCQsECAT Physics30 MCQsETEA Engineering Admission Test Physics30 MCQsGIKI Physics30 MCQsNED Physics30 MCQsPIEAS Physics30 MCQsPMD Physics25 MCQsBSN Entry Test Physics20 MCQsPAF Airman Physics15 MCQs

More Alternating Current questions

If in a series L-C-R AC circuit, the voltages across L, C and R are V1, V2 and V3 respectively, then the voltage of the source is always:

A direct current of 5A is superimposed on an alternating current I = 10 sin ωt flowing through the wire. The effective value of the resulting current will be

A series combination of L and R is connected to a battery of emf E and negligible internal resistance, then the final value of AC current depends upon:

For a series RLC circuit the power loss at resonance is:

To reduce the resonant frequency in an LCR circuit with a generator:

Which of the following parameters in series LCR circuit is analogous to driving force F(t) in mechanics?