Class-12-science » Physics. Q factor or quality factor is a dimensionless parameter that is used to describe the underdamped resonator and characterizes the bandwidth and center frequency of the resonator. thumb_up Like (1) Low Q circuits are therefore damped and lossy and high Q circuits are under-damped. Tests & Videos, you can search for the same too. This is possible only when you have the best CBSE Class 12 Physics study material and a smart preparation plan. Physics . Share 0. The mathematical representation is: Q = E stored /E lost per cycle. The sharpness of resonance can be understood better by understanding resonance. The term “quality factor” is more commonly associated with microwave resonators. It is defined as the ratio of the resonant Anubhav Singh. Free PDF download of Application of Derivatives Formulas for CBSE Class 12 Maths. Free PDF Download of CBSE Physics Multiple Choice Questions for Class 12 with Answers Chapter 7 Alternating Current. In physics and engineering the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is. Physics . Suppose a Voltage V is applied to a LCR circuit, where V is give by: V=Vm×sin⁡ωtV=V_{m}\times \sin \omega tV=Vm​×sinωt The current in this case is written by: I=Im×sin⁡(ωt+ϕ)I=I_{m}\times \sin \left ( \omega t+\phi \right )I=Im​×sin(ωt+ϕ) Where, Vm = Voltage Amplitude, Im = Current Amplitude, ω = Angular Frequency, ø = Phase Constant Now, Current Amplitude is related to Voltage Amplitude as: Im=VmZI_{m}=\frac{V_{m}}{Z}Im​=ZVm​​ Where, Z = Impedance of circuitand is given by: Z=(XL−XC)2+R2… Quality factor, Q Reactive components such as capacitors and inductors are often described with a figure of merit called Q. Low FBCG (0.01%) ... social and governance data with respect to underlying securities within more than 23,000 multi-asset class Mutual Funds and ETFs globally. Class 12 Maths Application of Derivatives Exercise 6.1 to Exercise 6.5, and Miscellaneous Questions NCERT Solutions are extremely helpful while doing your homework or while preparing for the exam. Alternating Current Important Questions for CBSE Class 12 Physics AC Currents. This is possible only when you have the best CBSE Class 12 Maths study material and a smart preparation plan. CBSE class 12 physics chapter wise key notes on chapter Alternating Current (Part - II) are available in this article. The Q factor is used to define the sharpness of the resonance. Get CBSE class 12 Physics notes on Alternating Current Part 3. There can be more than one community in a society. This document is highly rated by Class 12 students and has been viewed 106330 times. By continuing, I agree that I am at least 13 years old and have read and agree to the. CBSE Class 12 Physics Chapter 7 Alternating Current notes in PDF are available for free download in myCBSEguide mobile app. Quality factor is expressed as, Q-factor is a dimensionless quantity. Quality factor relates the maximum or peak energy stored in the circuit (the reactance) to the energy dissipated (the resistance) during each cycle of oscillation. In this Chapter we will learn the applications of those derivatives.The topics in the chapter includeFindingrate Quality factor relates the maximum or peak energy stored in the circuit (the reactance) to the energy dissipated (the resistance) during each cycle of oscillation. Your email address will not be published. The best app for CBSE students now provides Alternating Current class 12 Notes latest chapter wise notes for quick preparation of CBSE board exams and school-based annual examinations. Alternating Current . It is defined as the ratio of the resonant where Q is the quality factor or Q value of a forced harmonic oscillator, and $\omega_2$ and $\omega_1$ are the frequencies where the square of the amplitude $A_0$ is half its maximum value. Complete Physics can be a scary ordeal for some and a very interesting subject for the rest. Sep 20, 2014. If reading of voltmeter V shown in the figure at resonance is 200V , find the quality factor of the circuit :-how_to_reg Follow . Current in circuit, I = I 0 sin(ω t + ϕ) Instantaneous Power, P = VI. 12. (3) Do solved NCERT textbook examples. Class 12 | Physics | Chapter Wise Derivation List | EduRev Notes chapter (including extra questions, long questions, short questions, mcq) can be found on EduRev, you can check Quality factor relates the maximum or peak energy stored in the circuit (the reactance) to the energy dissipated (the resistance) during each cycle of oscillation. Share 0. Candidates who are ambitious to qualify the Class 12 with good score can check this article for Notes. using search above. It is defined as the peak energy stored in the circuit divided by the average energy dissipated in it per radian at resonance. Q factor or quality factor is a dimensionless parameter that is used to describe the underdamped resonator and characterizes the bandwidth and center frequency of the resonator. PHYSICS - CLASS XII Time : 3 Hrs. Do check out the sample questions EduRev is like a wikipedia Class 12 Physics Alternating Currents – Get here the Notes for Class 12 Physics Alternating Currents. 1.Phasor The representation of AC current and voltage by rotating vectors is calle^ phasor and the diagram representing these phasors is known as phasor diagram. Resonance frequency or resonant frequency is the maximum frequency at which the amplitude is relatively maximum. The Q factor of an RF resonant circuit is given as: The sharpness of resonance increases with an increase in damping and decreases with a decrease in damping. Marks : 70 The weightage of the distribution of marks over different dimensions of the question paper shall be as follows: A. W eightage to content/ subject units Unit Marks Electrostatics 08 Current Electricity 07 Magnetic Effect of Current & Magnetism 08 Electromagnetic Induction and Alternating current 08 Get Free NCERT Solutions for Class 12 Maths Chapter 6 Application of Derivatives. Average value of cos(2 ω t + ϕ) over a complete cycle is zero i.e., (b) Quality Factor (Q): In series LCR circuit the ratio of the voltage drop across inductor (or capacitor) to the voltage drop across resistor under resonance condition is called the quality factor Make correction thereafter. Class-XII . Get CBSE class 12 Physics notes on Alternating Current Part 3. CBSE class 12 physics chapter wise key notes on chapter Alternating Current (Part - II) are available in this article. This is To Study Class 12 | Physics | Chapter Wise Derivation List | EduRev Notes for Class 12 Sep 20, 2014. Class 12. Quality factor of the LCR circuit. thumb_up Like (1) • The quality factor increases with decreasing R • The bandwidth decreases with decreasing R By combining Equations (1.9), (1.10), (1.11) and (1.18) we obtain the relationship between the bandwidth and the Q factor. Share with your friends. (a) In series LCR circuit. EduRev is a knowledge-sharing community that depends on everyone being able to pitch in when they know something. Quality factor of the LCR circuit. In physics and engineering the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is. CBSE chapter wise practice papers with solution for class 12 Mathematics chapter 6 Application of Derivatives for free download in PDF format. 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