Resonance in LCR Circuit ,Alternating Current - Get topics notes, Online test, Video lectures, Doubts and Solutions for CBSE Class 12-science on TopperLearning. PHYSICS - CLASS XII Time : 3 Hrs. The mathematical representation is: Q = E stored /E lost per cycle. Alternating Current Important Questions for CBSE Class 12 Physics AC Currents. It is defined as the peak energy stored in the circuit divided by the average energy dissipated in it per radian at resonance. Important Derivations for CBSE Class 12 Physics. It is defined as the ratio of the resonant this is your one stop solution. While it can be defined in many ways, it’s most fundamental description is: average power dissipated energy stored Q=ω Thus, it is a measure of the ratio of stored vs. lost energy per unit time. Share 0. The term “quality factor” is more commonly associated with microwave resonators. Free PDF Download of CBSE Physics Multiple Choice Questions for Class 12 with Answers Chapter 7 Alternating Current. thumb_up Like (1) 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 This is possible only when you have the best CBSE Class 12 Maths study material and a smart preparation plan. Physics can be a scary ordeal for some and a very interesting subject for the rest. Your email address will not be published. Candidates who are ambitious to qualify the Class 12 with good score can check this article for Notes. He was evaluating the performance and quality of different coils. You can also find Class 12 | Physics | Chapter Wise Derivation List | EduRev Notes ppt and other Class 12 slides as well. • 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. Quality factor, Q Reactive components such as capacitors and inductors are often described with a figure of merit called Q. Sep 20, 2014. If you want Class 12 | Physics | Chapter Wise Derivation List | EduRev Notes Class-XII . derivation of quality factor? NOTES ON ‘ALTERNATING CURRENT’ (Class 12) Page 02 Phasor diagrams ... [For the derivation of the expression for band width, 2 = R/L, refer the note book] Q-FACTOR (Quality factor) It measures the sharpness of the resonance curve. Share with your friends. Q factor for a coil is defined for a given frequency as the ratio of inductance L to the resistance R of a coil. In this Chapter we will learn the applications of those derivatives.The topics in the chapter includeFindingrate Candidates who are ambitious to qualify the Class 12 with good score can check this article for Notes. 12. Stay tuned with BYJU’S to learn more about other Physics related concepts. 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