Скачать или смотреть 06-AC Through LCR Circuit | Resonance & Quality Factor Explained | Satish Goyal Physics Classes

Welcome to Satish Goyal Physics Classes, Kalkaji, New Delhi.
In today’s lecture, we will deeply understand how AC passes through an LCR Series Circuit, the exact condition of Resonance, and the meaning & importance of Quality Factor (Q-Factor) in AC circuits.
This lecture is extremely helpful for Class 12 CBSE, JEE, NEET, CUET, IB, CI, SAT Physics students.
📍 Topics Covered in This Lecture
✓ AC through LCR series circuit
✓ Impedance of LCR (Z = √(R² + (XL – XC)²))
✓ Phase difference between voltage and current
✓ Condition for resonance (XL = XC)
✓ Sharpness of resonance
✓ Bandwidth
✓ Quality factor (Q = ω₀L / R)
✓ Applications of resonance in circuits
✓ Graphs: Current vs Frequency, Power vs Frequency
✓ Energy stored in L and C
✓ Practical use of LCR circuits in tuning radios, filters, oscillators
📍 Why This Lecture Is Important
Understanding LCR circuits is crucial for scoring in:
🔹 NCERT Class 12 Physics – Chapter: Alternating Current
🔹 JEE Mains & Advanced
🔹 NEET Physics
🔹 CBSE Board Exams
🔹 Competitive exams with AC circuits
Resonance concepts help students visualise how circuits behave with changing frequencies and why tuning circuits are used in electronic devices.
📍 About the Teacher
Satish Goyal has been teaching Physics for Class 8 to 12, IIT-JEE, NEET and Board exams for 18+ years.
Institute: Satish Goyal Physics Classes, M-49, Kalkaji, New Delhi
Website: www.satishgoyalphysics.com
Contact: 9711289192
📍 What You Will Learn
⭐ How AC current changes with frequency in an LCR circuit
⭐ Why resonance gives maximum current
⭐ How inductive and capacitive reactances cancel
⭐ Derivation of Q-Factor and its physical meaning
⭐ How bandwidth is inversely proportional to Q
⭐ Real-life examples: tuning circuits, filters, wireless communication
📍 More Videos in This AC Series
➤ AC Through Resistor
➤ AC Through Inductor
➤ AC Through Capacitor
➤ Mean Value and RMS Value
➤ Power in AC
➤ EMI and Inductance Series
…and many more coming soon!
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✨ Thank you for learning with Satish Goyal Physics Classes!
Keep practicing and keep improving.
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