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  PHYSICS CLASS-12 CBSE/ICSE/IB BOARD/BSEB BIHAR/ IIT-JEE/NEET OPTICS LECTURE-21 MAGNIFICATION OF LENSES / LINEAR MAGNIFICATION PRODUCED BY LENSES ( CONVEX LENS AND CONCAVE LENS ) : Linear magnification of lenses : 1. Definition of linear magnification 2. Expression for magnification Linear magnification produced by convex lens : 1. Definition 2. Formula 3. Derivation of expression for linear magnification 4. Ray diagram Linear magnification by concave lens : 1. Definition 2. Formula 3. Derivation of expression for linear magnification 4. Ray diagram BY SHIVANAND CHOUDHARY Website: https://www.snphysicsexpert.com Blog: https://snphysicsexpert.blogspot.com Facebook page: https://www.facebook.com/snphysicsexpert Facebook: https://www.facebook.com/shivanand.chaudhary.5 Instagram: https:www.instagram.com/shivanand.chaudhary.5 Twitter: https://www.twitter.com/snchaudhary2014 LinkedIn: https://www.linkedin.com/in/shivanand-chaudhary-7061028b B.D.GURUKUL ...

  PHYSICS CLASS-12 CBSE/ICSE/IB BOARD/BSEB BIHAR/ALL INDIAN BOARDS/IIT-JEE/NEET UNIT-06 OPTICS RAY OPTICS : LENS FORMULA FOR CONVEX LENS : Lens formula in convex lens for real image : 1. Introduction 2. What is lens formula ? 3. Principle 4. Ray diagram 5. Position of image 6. Nature of image 7. Derivation of lens formula Lens formula in convex lens for virtual image : 1. Introduction 2. What is lens formula ? 3. Principle 4. Ray diagram 5. Position of image 6. Nature of image 7. Derivation of lens formula BY SHIVANAND CHOUDHARY Website: https://www.snphysicsexpert.com Blog: https://snphysicsexpert.blogspot.com Facebook page: https://www.facebook.com/snphysicsexpert Facebook: https://www.facebook.com/shivanand.chaudhary.5 Instagram: https:www.instagram.com/shivanand.chaudhary.5 Twitter: https://www.twitter.com/snchaudhary2014 LinkedIn: https://www.linkedin.com/in/shivanand-chaudhary-7061028b B.D.GURUKUL Google page: https://g.page/BDGurukul...

  Lens Maker's Formula in Convex Lens and Concave Lens 1. What is lens maker's formula ? 2. Definition of lens maker's formula 3. Uses of lens maker's formula 4. Assumptions used in Lens Maker's Formula 5. Cartesian Sign Conventions used in deriving lens maker's formula 6. Derivation of lens maker's formula in Convex Lens     (a) Ray diagram     (b) Formation of image      (c)  Explanation of formation of image       (d) Derivation of lens maker's formula in convex lens 7. Derivation of Lens Maker's Formula in Concave Lens a) Ray diagram     (b) Formation of image      (c)  Explanation of formation of image       (d) Derivation of lens maker's formula in concave lens PHYSICS CLASS-12 FOR CBSE/ICSE/IB BOARD/BSEB BIHAR/ ALL INDIAN BOARDS/IIT-JEE/NEET OPTICS RAY OPTICS UNIT-06 LECTURE-17 BY SHIVANAND CHOUDHARY Website:...

  PHYSICS CLASS-12 CBSE BOARD/JEE-IIT/NEET/ICSE BOARD/BSEB (BIHAR BOARD) LECTURE-6 CHAPTER : MAGNETS AND EARTH MAGNETISM TOPICS : TORQUE EXPERIENCED BY BAR MAGNET ( MAGNETIC DIPOLE ) HELD IN A UNIFORM MAGNETIC FIELD, POTENTIAL ENERGY OF A MAGNETIC DIPOLE ( BAR MAGNET ) PLACED IN A UNIFORM MAGNETC FIELD : Torque on a bar magnet placed in a magnetic field: Definition of torque, Derivation of an expression for torque, Special cases, Vector form of expression, Definition of torque in terms of dipole moment, Potential energy of a bar magnet held in a magnetic field : Definition, Derivation of an expression for potential energy, Special cases, Vector form of expression. BY SHIVANAND CHOUDHARY www.snphysicsexpert.com B.D.GURUKUL RISHI NAGAR, RANIBAGH, DELHI-34, INDIA Google page : https://g.page/bdgurukul Facebook page : S n Physics Expert Visit : JUST DIAL ,GOOGLE, TWITTER, YOUTUBE, INSTAGRAM, LinkedIn https://www.youtube.com/c/BDGURUKUL

  PHYSICS CLASS-12 CBSE/ICSE/JEE-IIT/NEET/BSEB ( BIHAR BOARD ) LECTURE-5 CHAPTER: MAGNETS AND EARTH MAGNETISM MAGNETIC FIELD INTENSITY DUE TO A BAR MAGNET AT APOINT ON AXIAL/ EQUATORIAL POSITION : Magnetic field intensity at a point on axial position due to a bar magnet, Magnetic field strength at a point on axial position due to a bar magnet, Derivation of expression for magnetic field intensity at a point on axial position/ equatorial position, Magnetic field intensity due to a bar magnet at a point on equatorial position. Relation between magnetic field intensity at axial position and magnetic field intensity at a point on equatorial position. BY SHIVANAND CHOUDHARY www.snphysicsexpert.com B.D.GURUKUL Rishi Nagar, Ranibagh, Delhi-34, India Google page:https://g.page/bdgurukul Facebook page: S n Physics Expert https://www.youtube.com/c/BDGURUKUL VISIT: JUST DIAL, TWITTER, INSTAGRAM, GOOGLE, LinkedIn

  PHYSICS CLASS-12 CBSE/JEE-IIT/NEET/ICSE/BSEB ( BIHAR BOARD ) LECTURE-4 CHAPTER : MAGNETS AND EARTH MAGNETISM TOPICS : MAGNETIC DIPOLE, MAGNETIC DIPOLE MOMENT, MAGNETIC DIPOLE FIELD, MAGNETIC FIELD INTENSITY/MAGNETIC  FIELD STRENGTH/MAGNETIC FIELD  INDUCTION/MAGNETIC FLUX DENSITY : Magnetic dipole: Definition of magnetic dipole, Examples magnetic dipole, Strength of magnetic dipole . Magnetic dipole moment : Definition of magnetic dipole moment, Measurement of magnetic dipole moment, SI Unit, Dimensional formula. Magnetic dipole field : Concept of magnetic dipole field , Magnetic field intensity/magnetic field strength/magnetic  field induction/ magnetic flux density : Definition, Mathematical expression, Scalar or vector, SI Unit, other units. BY SHIVANAND CHOUDHARY www.snphysicsexpert.com B.D.GURUKUL RISHI NAGAR, RANIBAGH, DELHI-34, INDIA Google page : https://g.page/bdgurukul Facebook page :S n Physics Expert Visit: JUST DIAL, INSTAGRAM,...

  PHYSICS CLASS-12 CBSE/JEE-IIT/NEET/ICSE/BSEB (BIHAR BOARD ) LECTURE-3 MAGNETS AND EARTH MAGNETISM MAGNETIC FIELD AND MAGNETIC FIELD LINES & PROPERTIES OF MAGNETIC FIELD LINES : Magnetic field : Concept of magnetic field, Definition of magnetic field, Strength of magnetic field, Faradays views on magnetic field. Magnetic field lines : Concept of magnetic field line, Definition of magnetic field line, Definition of magnetic field line by Faraday, Father of electricity, Properties of magnetic field lines : 1. Magnetic field lines are closed continuous curves 2. They will never intersect each other. 3. They contract longitudinally. 4. They dilate laterally. BY SHIVANAND CHOUDHARY www.snphysicsexpert.com B.D. GURUKUL RISHI NAGAR, RANIBAGH, DELHI-34, INDIA Google page: https://g.page/bdgurukul Facebook page: S n Physics Expert VISIT : GOOGLE, TWITTER, YOUTUBE, JUST DIAL, INSTAGRAM, LinkedIn

  PHYSICS CLASS-12 CBSE/JEE-IIT/NEET/ICSE/BSEB(BIHAR BOARD) LECTURE-2 MAGNETS AND EARTH MAGNETISM BASICS OF MAGNET AND MAGNETISM AND COULOMB'S LAW : Basics of magnet and magnetism :                      1.  Attractive and directive property of a magnet, 2. Inductive property of a magnet and magnetic induction, 3. Induction occurs before attraction, 4. Repulsion is the surer test of a magnet, 5. Magnetic pole and magnetic pole strength, 6. Coulomb's law of magnetic force. 7. Numerical based on Coulomb's law, 8.Definition of Unit Pole and SI Unit of pole strength, 9.Magnetic permeability of free space, 10. Molecular theory of magnetism . BY SHIVANAND CHOUDHARY www.snphysicsexpert.com B.D.GURUKUL www.youtube.com/c/BDGURUKUL RISHI NAGAR ,RANIBAGH, DELHI-34, INDIA VISIT : GOOGLE, YOUTUBE, INSTAGRAM, JUST DIAL, TWITTER, LinkedIn GOOGLE PAGE : https://g.page/BDGurukul Facebook page : S n Physics Expert

PHYSICS CLASS-12 CBSE/ICSE/IB BOARD/BSEB BIHAR BOARD/ ALL INDIAN BOARDS/IIT-JEE/NEET MAGNETS AND EARTH MAGNETISM LECTURE-01 BASICS OF MAGNETISM : 1. Magnet 2. Introduction of a magnet 3. Attractive and directive properties of a magnet 4. Pole of a magnet 5. Kinds of magnet 6. Magnetic length 7. Magnetic axis 8. Magnetic meridian 9. Geographical meridian 10. Equatorial line 11. Axial line 12.Pole strength of a magnet 13. Molecular theory of magnet etc. BY SHIVANAND CHOUDHARY Website: https://www.snphysicsexpert.com Blog: https://snphysicsexpert.blogspot.com Facebook page: https://www.facebook.com/snphysicsexpert Facebook: https://www.facebook.com/shivanand.chaudhary.5 Instagram: https:www.instagram.com/shivanand.chaudhary.5 Twitter: https://www.twitter.com/snchaudhary2014 LinkedIn: https://www.linkedin.com/in/shivanand-chaudhary-7061028b B.D.GURUKUL Google page: https://g.page/BDGurukul Youtube Channel : https://youtube.com/c/BDGURUKUL #bdgurukul #physics #magnet ...

  PHYSICS CLASS-12 CBSE/ICSE/IB BOARD/BSEB BIHAR/IIT-JEE/NEET/ALL INDIAN BOARDS OPTICS LECTURE-13 REFRACTION OF LIGHT AT CONVEX SPHERICAL SURFACE FROM RARER TO DENSER MEDIUM FOR REAL IMAGE : Refraction of light at convex spherical surface from rarer to denser medium for real image : 1. Introduction 2. Ray diagram 3. Derivation of relation between object distance (u) , image distance (v) and radius of curvature of spherical surface(R)                                                                          OR Prove n2/v - n1/u =( n2-n1)/R 4. Assignments BY SHIVANAND CHOUDHARY Website: https://www.snphysicsexpert.co...

https://drive.google.com/file/d/1RnEBFI9IzJgS-jDPGoQSxmszISsEBQ80/view?usp=sharing   SCIENCE 1, What is science ? 2. Main branches of science :    (a) Physics    (b) Chemistry     (c) Biology:          (i) Botany          (ii) Zoology      (d) Astronomy      (e) Geology      (f) Mathematics 3. Physics  (a) What is Physics?  (b) Origin of Physics 4. Main branches of Physics BY SHIVANAND CHOUDHARY Website: https://www.snphysicsexpert.com Blog: https://snphysicsexpert.blogspot.com Facebook page: https://www.facebook.com/snphysicsexpert Facebook: https://www.facebook.com/shivanand.chaudhary.5 Instagram: https:www.instagram.com/shivanand.chaudhary.5 Twitter: https://www.twitter.com/snchaudhary2014 LinkedIn: https://www.linkedin.com/in/shivanand-chaudhary-7061028b B.D.GURUKUL Google page: https://g.page/BDGurukul Youtube Chann...

  RELATION BETWEEN REAL AND APPARENT DEPTH : 1.Ray diagram 2. Derivation of relation 3. A water tank appears shallower than actual depth CRITICAL ANGLE : 1. Definition of critical angle 2. Ray diagram 3. Derivation of relation between critical angle and refractive index of the medium TOTAL INTERNAL REFLECTION : 1. Definition of total internal reflection 2. Ray diagram 3. Condition for total internal reflection. PHYSICS CLASS-12 CBSE/ICSE/IB BOARD/BSEB BIHAR BOARD/IIT-JEE/NEET LECTURE-12 BY SHIVANAND CHOUDHARY Website: https://www.snphysicsexpert.com Blog: https://snphysicsexpert.blogspot.com Facebook page: https://www.facebook.com/snphysicsexpert Facebook: https://www.facebook.com/shivanand.chaudhary.5 Instagram: https:www.instagram.com/shivanand.chaudhary.5 Twitter: https://www.twitter.com/snchaudhary2014 LinkedIn: https://www.linkedin.com/in/shivanand-chaudhary-7061028b B.D.GURUKUL Google page: https://g.page/BDGurukul Youtube Channel : https://yo...

  PHYSICS CLASS-12 CBSE/ICSE/IB BOARD/BSEB BIHAR BOARD/IIT-JEE/NEET OPTICS LECTURE-11 REFRACTION OF LIGHT THROUGH GLASS SLAB & REFRACTION OF LIGHT THROUGH COMPOUND PLATES & DERIVATION OF AN EXPRESSION FOR LATERAL DISPLACEMENT Refraction of light through glass slab : 1. Glass slab 2. Refraction of light 3. Schematic ray diagram Expression for lateral displacement 1. Ray diagram 2. Derivation REFRACTION OF LIGHT THROUGH COMPOUND PLATES i.e.THROUGH DIFFERENT MEDIA 1. Schematic ray diagram 2. Derivation of relation between refractive indices of air,water and glass BY SHIVANAND CHOUDHARY Website: https://www.snphysicsexpert.com Blog: https://snphysicsexpert.blogspot.com Facebook page: https://www.facebook.com/snphysicsexpert Facebook: https://www.facebook.com/shivanand.chaudhary.5 Instagram: https:www.instagram.com/shivanand.chaudhary.5 Twitter: https://www.twit...

  PHYSICS CLASS-10 CBSE/ICSE/BSEB BIHAR BOARD/ IB BOARD/ NTSE/ SCIENCE OLYMPIAD LECTURE-10 SCIENCE CHAPTER-10 REFRACTION OF LIGHT AND LAWS OF REFRACTION SNELL'S LAW OF REFRACTION OF LIGHT : Refraction of light : 1. Definition of refraction of light 2. Ray diagram 3. Cause of refraction of light 4. Refraction from rarer to denser medium 5. Refraction from denser to rarer medium 6. Incident ray 7. Refracted ray 8. Angle of incidence 9. Refracted angle 10. When refraction occurs        (a) Velocity of light changes        (b) Wave length of light changes        (c) Phase of light remains constant        (d) Frequency of light remains constant Laws of refraction : 1. First law of refraction 2. Second law of refraction or Snell's law of refraction Refractive index of a medium or Optical density of a medium : 1. Refractive index of a medium 2...

  PHYSICS CLASS-10 CBSE/ICSE/IB BOARD/BSEB BIHAR BOARD/NTSE/SCIENCE OLYMPIAD SCIENCE CHAPTER-10 LECTURE-09 MAGNIFICATION BY CONCAVE AND CONVEX MIRRORS : Magnification : 1. Definition of magnification 2. Kinds of magnification    (a) Linear magnification     (b) Angular magnification     (c) Aereal magnification     (d) Axial magnification 3. Magnification in terms of object distance(u) and image distance (v) 4. Magnification in terms of u and f 5. Magnification in terms of v and f 6. Cartesian sign convention for magnification (m) 7. Relation between speed of object and speed of image . BY S.N.CHOUDHARY Website : https://www.snphysicsexpert.com Blog :https://snphysicsexpert.blogspot.com Facebook page: https://www.facebook.com/snphysicsexpert Instagram :https://www.instagram.com/shivanand.chaudhary.5 Facebook : https://www.facebook.com/shivanand.chaudhary.5 Twitter :https://www.twitter.com/snchaudhary201...