エピソード

  • Alternating Current

    Alternating Current
    2026/10/18
    Alternating Current, Class 12 Physics NCERT: quick revision in Hindi, about 13 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - What AC is and why it is used - Resistor in AC circuits and rms values - Phasors as rotating vectors - Inductor in AC: reactance and phase lag - Capacitor in AC: reactance and phase lead - Series LCR circuit and impedance - Resonance and resonant frequency - AC power, power factor, and transformers Timestamps: 0:00 Introduction 0:17 Roadmap 0:46 What is AC and why we use it 1:29 AC through a resistor and rms values 2:45 Quick quiz 1 3:16 Phasors explained 3:46 AC through an inductor 4:43 AC through a capacitor 5:26 Common mistakes: reactance and phasors 5:58 Quick quiz 2 6:32 Series LCR circuit and impedance 7:45 Resonance in LCR circuit 8:39 Common mistakes: LCR and resonance 9:04 AC power and power factor 10:10 Quick quiz 3 10:41 Transformer working and turns ratio 11:44 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    13 分
  • Electromagnetic Induction

    Electromagnetic Induction
    2026/10/17
    Electromagnetic Induction, Class 12 Physics NCERT: quick revision in Hindi, about 15 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Faraday and Henry's induction experiments - Magnetic flux - Faraday's law of induction - Lenz's law and energy conservation - Motional emf - Mutual and self-inductance - Energy stored in an inductor - AC generator Timestamps: 0:00 Introduction 0:19 Roadmap 0:51 Faraday and Henry's experiments 2:02 Quick quiz 1 2:32 Magnetic flux explained 3:19 Faraday's law of induction 4:05 Lenz's law and energy conservation 5:09 Quick quiz 2 5:37 Motional emf 6:36 Common mistakes with flux and Lenz's law 7:30 Inductance as electrical inertia 8:12 Mutual inductance 9:19 Self-inductance and back emf 10:22 Energy stored in an inductor 11:31 AC generator 12:45 Quick quiz 3 13:14 Common mistakes with inductance and energy 13:49 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    15 分
  • Magnetism and Matter

    Magnetism and Matter
    2026/10/14
    Magnetism and Matter, Class 12 Physics NCERT: quick revision in Hindi, about 13 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Earth's magnetism and bar magnet field lines - Bar magnet as an equivalent solenoid - Why isolated magnetic monopoles don't exist - Torque and potential energy of a dipole in a uniform field - Electric dipole analogy for magnetic dipole fields - Gauss's law for magnetism - Magnetisation, magnetic intensity, susceptibility and permeability - Diamagnetic, paramagnetic and ferromagnetic materials Timestamps: 0:00 Introduction 0:17 Roadmap 0:48 Magnetism is universal: Earth as a magnet 1:16 Bar magnet field lines and their properties 2:01 Bar magnet as an equivalent solenoid 2:48 Breaking a magnet: no isolated monopole 3:29 Torque and potential energy on a dipole in uniform field 4:33 Quick quiz 1 4:56 Analogy with electric dipole equations 5:32 Common mistakes with torque and energy signs 5:49 Gauss's law for magnetism 6:22 Magnetisation and magnetic intensity H 7:24 Susceptibility and relative permeability 7:57 Difference between B and H 8:16 Three types of magnetic materials 8:40 Diamagnetism and the Meissner effect 9:18 Paramagnetism explained 9:52 Quick quiz 2 10:18 Ferromagnetism and magnetic domains 11:02 Common mistakes: dia, para vs ferro 11:25 Quick quiz 3 11:45 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    13 分
  • Ch 8 Electromagnetic Waves | Class 12 Physics in Hindi

    Ch 8 Electromagnetic Waves | Class 12 Physics in Hindi
    2026/10/19
    Electromagnetic Waves, Class 12 Physics NCERT Chapter 8: quick revision in Hindi, about 15 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Maxwell's idea and displacement current - Ampere-Maxwell law - What electromagnetic waves are and why no medium is needed - How accelerating charges produce EM waves - Relation between E and B fields (E0 = cB0) - Energy, momentum and radiation pressure - The electromagnetic spectrum, radio waves to gamma rays Timestamps: 0:00 Introduction 0:19 Roadmap 0:46 Maxwell's idea: changing E field makes B field 1:41 Displacement current and Ampere-Maxwell law 2:51 Displacement current is not a real charge flow 3:08 Quick quiz 1 3:35 What is an electromagnetic wave 4:25 EM waves need no medium, and what creates them 4:48 Source of EM waves: accelerating charges 5:33 Quick quiz 2 6:03 E and B fields: perpendicular, amplitude relation 7:30 E, B and propagation direction are mutually perpendicular 7:50 Energy, momentum and radiation pressure 8:44 The electromagnetic spectrum overview 9:34 Radio waves and microwaves 10:14 Infrared and visible light 11:04 Ultraviolet, X-rays and gamma rays 12:07 Common mistakes about the EM spectrum 12:54 Quick quiz 3 13:29 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    15 分