Episodes

  • Waves

    Waves
    Oct 12 2026
    Waves, Class 11 Physics NCERT Chapter 14: 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 a wave carries: energy, not matter - Transverse vs longitudinal waves - The wave equation, amplitude, wavelength and frequency - Speed of a wave: on a stretched string and sound in air - Superposition and reflection of waves - Standing waves, normal modes and harmonics in pipes - Beats and beat frequency Timestamps: 0:00 Introduction 0:20 Roadmap 0:49 What a wave carries: energy, not matter 1:31 Transverse vs longitudinal waves 2:19 Common mistake: wave vs particle direction 2:43 The wave equation and its parts 3:39 Wavelength, period and frequency 4:26 Common mistakes with the 2 pi factor 4:57 Wave speed = frequency times wavelength 5:43 Speed of a wave on a stretched string 6:18 Speed of sound in air: Newton vs Laplace 7:07 Quick quiz 1 7:32 Principle of superposition of waves 8:04 Wave reflection: rigid vs free boundary 8:32 Quick quiz 2 8:55 Standing waves and normal modes 10:05 Harmonics in open and closed pipes 10:40 Common mistakes with standing waves 10:59 Quick quiz 3 11:25 Beats and beat frequency 12:01 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 mins
  • Oscillations

    Oscillations
    Oct 12 2026
    Oscillations, Class 11 Physics NCERT Chapter 13: quick revision in Hindi, about 16 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Periodic vs oscillatory motion - Period and frequency - Displacement in oscillations - Simple harmonic motion (SHM) - SHM and uniform circular motion - Velocity, acceleration and force law in SHM - Energy in SHM - Simple pendulum period formula Timestamps: 0:00 Introduction 0:17 Roadmap 0:46 Periodic vs oscillatory motion 1:42 Period and frequency 2:24 Quick quiz 1 3:03 What displacement means in oscillations 3:50 Simple harmonic motion (SHM) equation 4:52 Phase vs phase constant mistakes 5:32 SHM as projection of circular motion 6:48 Velocity and acceleration in SHM 8:19 Quick quiz 2 8:43 SHM force law and spring constant 9:48 Energy in SHM: kinetic and potential 10:50 Minus sign and energy mistakes in SHM 11:36 Simple pendulum and its period 13:04 Quick quiz 3 13:38 Small angle approximation trap 14:04 One-minute recap Next chapter: Waves The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    16 mins
  • Kinetic Theory

    Kinetic Theory
    Oct 12 2026
    Kinetic Theory, Class 11 Physics NCERT Chapter 12: 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: - Atomic hypothesis and structure of matter - Ideal gas equation (PV = nRT) - Kinetic theory of gas pressure - Temperature as average kinetic energy - Law of equipartition of energy - Specific heat of monatomic and diatomic gases - Degrees of freedom and common mistakes - Mean free path of gas molecules Timestamps: 0:00 Introduction 0:18 Roadmap 0:47 Atomic hypothesis and size of atoms 1:34 Ideal gas equation 2:39 Mistake: forgetting to use Kelvin 2:58 Kinetic theory derivation of gas pressure 3:47 Temperature as average kinetic energy 4:45 Quick quiz 1 5:22 Mistake: assuming all molecules have same speed 5:47 Law of equipartition of energy 6:30 Specific heat of monatomic gases 7:37 Specific heat of diatomic gases 8:29 Quick quiz 2 8:59 Specific heat of polyatomic gases and solids 9:59 Mistakes in counting degrees of freedom 10:30 Mean free path of gas molecules 11:26 Quick quiz 3 11:51 Mistake: mean free path vs interatomic distance 12:11 One-minute recap Next chapter: Oscillations The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    13 mins
  • Thermodynamics

    Thermodynamics
    Oct 12 2026
    Thermodynamics, Class 11 Physics NCERT Chapter 11: 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: - Heat as energy and thermal equilibrium - Zeroth law and the concept of temperature - Internal energy, heat and work - First law of thermodynamics - State variables and ideal gas equation - Isothermal, adiabatic, isochoric, isobaric and cyclic processes - Second law of thermodynamics - Reversible, irreversible processes and Carnot engine Timestamps: 0:00 Introduction 0:20 Roadmap 0:49 Heat as a form of energy and thermal equilibrium 1:37 Zeroth law of thermodynamics and temperature 2:08 Heat, internal energy and work 2:48 Common misconception: heat vs temperature vs internal energy 3:13 First law of thermodynamics 3:46 Quick quiz 1 4:13 State variables and equation of state 4:55 Quasi-static process 5:27 Isothermal and adiabatic process 6:31 Misconception: isothermal does not mean no heat exchange 6:55 Isochoric, isobaric and cyclic process 7:53 Quick quiz 2 8:17 Second law of thermodynamics 8:56 Reversible and irreversible processes 9:28 Misconception: reversible means more than system returning 9:49 Carnot engine and its efficiency 10:58 Quick quiz 3 11:21 One-minute recap Next chapter: Kinetic Theory The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    13 mins
  • Thermal Properties of Matter

    Thermal Properties of Matter
    Oct 12 2026
    Thermal Properties of Matter, Class 11 Physics NCERT Chapter 10: quick revision in Hindi, about 12 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Heat vs temperature and thermal equilibrium - Temperature scales and absolute zero - Thermal expansion and the anomalous behavior of water - Specific heat capacity and calorimetry - Change of state and latent heat - Conduction, convection and radiation - Blackbody radiation and Stefan-Boltzmann law - Newton's law of cooling Timestamps: 0:00 Introduction 0:20 Roadmap 0:51 Heat vs temperature and thermal equilibrium 1:30 Celsius, Fahrenheit, Kelvin and absolute zero 2:42 Common mistakes: heat, temperature and Kelvin 3:07 Quick quiz 1 3:32 Thermal expansion and water's anomalous behavior 4:26 Quick quiz 2 4:51 Specific heat capacity and calorimetry 5:50 Mistakes in heat capacity and calorimeter problems 6:12 Change of state and latent heat 7:16 Quick quiz 3 7:44 Common mistakes in phase change problems 8:08 Conduction and convection 9:10 Radiation, blackbody and Stefan-Boltzmann law 10:04 Common mistakes in heat transfer 10:28 Newton's law of cooling 11:02 One-minute recap Next chapter: Thermodynamics The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    12 mins
  • Mechanical Properties of Fluids

    Mechanical Properties of Fluids
    Oct 12 2026
    Mechanical Properties of Fluids, Class 11 Physics NCERT Chapter 9: quick revision in Hindi, about 12 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Fluids, pressure and density - Pascal's law and pressure at depth - Atmospheric and gauge pressure - Hydraulic machines - Streamline flow and equation of continuity - Bernoulli's principle and dynamic lift - Viscosity and Stokes' law - Surface tension, angle of contact and capillary rise Timestamps: 0:00 Introduction 0:21 Roadmap 0:53 Fluids, pressure and density 1:52 Pascal's law and pressure at depth 2:38 Atmospheric and gauge pressure 3:15 Hydraulic machines 3:54 Quick quiz 1 4:19 Common mistakes about pressure 4:42 Streamline flow and equation of continuity 5:22 Bernoulli's principle and Torricelli's law 6:31 Dynamic lift and the Magnus effect 6:58 Quick quiz 2 7:20 Viscosity and Stokes' law 8:05 Surface tension and surface energy 8:38 Angle of contact 9:07 Excess pressure in drops, bubbles and capillary rise 10:02 Common mistakes on flow and surface tension 10:32 Quick quiz 3 10:53 One-minute recap Next chapter: Thermal Properties of Matter The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    12 mins
  • Ch 8 Mechanical Properties of Solids | Class 11 Physics in Hindi

    Ch 8 Mechanical Properties of Solids | Class 11 Physics in Hindi
    Oct 12 2026
    Mechanical Properties of Solids, Class 11 Physics NCERT Chapter 8: quick revision in Hindi, about 14 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Elasticity and plasticity - Stress and strain (longitudinal, shearing, hydraulic) - Hooke's Law - Stress-strain curve, brittle vs ductile materials - Young's modulus, shear modulus and bulk modulus - Poisson's ratio - Elastic potential energy per unit volume - Engineering applications of elasticity Timestamps: 0:00 Introduction 0:17 Roadmap 0:51 Elasticity and plasticity defined 1:22 Stress and strain: types and formulas 3:05 Stress is not force, strain is not deformation 3:37 Quick quiz 1 4:06 Hooke's Law and modulus of elasticity 4:57 Hooke's Law only holds within the elastic limit 5:16 Stress-strain curve: yield point to fracture 6:18 Proportional limit vs elastic limit 6:40 Quick quiz 2 7:10 Young's modulus explained 8:28 Shear modulus explained 9:18 Bulk modulus and compressibility 10:23 Quick quiz 3 10:47 Poisson's ratio explained 11:37 Elastic potential energy in a stretched wire 12:25 Elasticity in engineering: cranes, bridges, mountains 13:07 One-minute recap Next chapter: Mechanical Properties of Fluids The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    14 mins
  • Gravitation

    Gravitation
    Oct 12 2026
    Gravitation, Class 11 Physics NCERT Chapter 7: 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: - Galileo's free-fall experiments - Kepler's three laws of planetary motion - Newton's universal law of gravitation - Cavendish experiment and the value of G - Acceleration due to gravity, g - Variation of g with height and depth - Gravitational potential energy and escape speed - Satellites: orbital speed, period and energy Timestamps: 0:00 Introduction 0:18 Roadmap 0:51 From Galileo to Newton: history of gravity 1:39 Kepler's three laws of planetary motion 2:52 Newton's universal law of gravitation 3:44 G and the Cavendish experiment 4:34 Acceleration due to gravity, g 5:33 Common mistakes: G vs g, mass and falling 6:20 How g changes with height and depth 7:48 Quick quiz 1 8:30 Gravitational potential energy 9:23 Escape speed 10:29 Quick quiz 2 11:10 Satellites orbiting Earth 12:14 Does a satellite need fuel to stay in orbit? 12:32 Energy of an orbiting satellite 13:44 Quick quiz 3 14:22 One-minute recap Next chapter: Mechanical Properties of Solids The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    15 mins