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In this section you will cover the following topics as per the syllabus:

• Electric Charges
• Conservation of charge
• Coulomb's law-force between two point charges
• Forces between multiple charges
• Superposition principle and continuous charge distribution
• Electric field
• Electric field due to a point charge
• Electric field lines
• Electric Dipole
• Electric field due to a dipole
• Torque on a dipole in uniform electric field
• Electric Flux
• Statement of Gauss's Theorem
• Its application to find field due to infinitely long straight wire
• Uniformly charged infinite plane sheet
• Uniformly charged thin spherical shell( field inside and outside)

00:00:00

### Lecture 2: Electric charges and fields -2

00:47:38

In this Unit you will learn the following:

• Electric Potential
• Potential Difference
• Potential due to a point charge
• A dipole and system of charges
• Equipotential surfaces
• Electrical Potential Energy of a system of two points charges and of electric dipole in an electrostatic field
• Conductor and Insulator
• Free charges and bound charges inside a conductor
• Dielectric and electric polarisation
• Capacitor and Capacitance
• Combination of Capacitors in series and in parallel
• Capacitance of parallel plate capacitor with r without dielectric medium between the plates
• Energy stored in a capacitor

01:07:50

01:12:54

### Lecture 3: Electrostatic Potential and Capacitance - 3

00:57:36

In this Unit you will learn the following:

• Electric Current
• Flow of electric charges in a metallic conductor
• Drift velocity, mobility and their relation with electric current
• Ohm's law
• Electrical Resistance
• V-I characteristic(linear and non-linear)
• Electrical Energy and Power
• Electrical Resistivity and Conductivity
• Carbon Resistors
• Colour code for carbon resistors
• Series and Parallel Combination
• Temperature dependence of resistance
• Internal Resistance of a cell potential difference and emf of a cell
• Combination of cells in series and in parallel
• Kirchhoff's Laws
• Simple Applications
• Wheatstone bridge
• Meter Bridge
• Potentiometer - Principle and its applications to measure potential difference and for comparing emf of two cells
• Measurement of internal resistance of a cell.

01:02:08

### Lecture 6: Current Electricity -2

00:44:38

Moving Charges and Magnetism

• Concept of magnetic field
• Oersted's Experiment
• Biot-Savart law and its application to current carrying loop
• Ampere's law and application to infinitely long straight wire
• Straight and toroidal solenoids
• Force on a moving charge in magnetic and electric field
• Cyclotron
Magnetism and Matter
• Current loop as a magnetic dipole
• Magnetic dipole moment
• Magnetic dipole moment of a revolving electron
• Magnetic field intensity due to a magnetic dipole(bar magnet) along its axis and perpendicular to its axis.
• Torque on a magnetic dipole( bar magnet) in a uniform magnetic field
• bar magnet as an equivalent solenoid
• magnetic field lines
• Earth's magnetic field and magnetic elements
• Para, dia and ferro magnetic substances with examples
• Electromagnets and factors affecting their strengths
• Permanent Magnet

01:06:08

01:07:07

01:07:10

00:57:27

00:59:30

### Lecture 13: Magnetism -3

00:49:42

Electromagnetic Induction

• Induced emf and current
• Lenz's law
• Eddy Currents
• Self and mutual induction
Alternating Current
• Alternating Currents
• Peak and rms value of alternating current/ Voltage
• Reactance and Impedence
• LC Oscillations(qualitative treatment only)
• LCR series circuit
• Resonance
• Power in AC circuits
• Wattless current.
AC generator and transformer

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01:10:54

01:02:16

00:52:41

00:55:41

00:56:55

### Lecture 20: Alternating Current -5

00:59:38

In this section you will learn the following:

• Basic idea and displacement current.
• Electromagnetic waves, their characterstics, their transverse nature( qualitative ideas only)
• Electromagnetic Spectrum( radio waves, micro waves, infrared, visible, ultraviolet, X rays, Gamma rays) including elementary facts about their uses.

### Lecture 21: Electromagnetic Waves

00:54:34

Ray  Optics:: Reflection of light, spherical mirrors, mirror formula. Refraction of light, total internal reflection and its applications, optical fibres, refraction at spherical surfaces, lenses, thin lens formula, lensmaker’s formula. Magnification, power of a lens, combination of thin lenses in contact combination of a lens and a mirror. Refraction and dispersion of light through a prism.

00:48:44

00:55:00

00:57:45

00:54:01

### Lecture 26: Ray Optics Part 5

01:06:25

Wave front and Huygen's principle, reflection and refraction of plane wave at a plane surface using wave fronts. Proof of laws of reflection and refraction using Huygen's principle. Interference Young's double slit experiment and expression for fringe width, coherent sources and sustained interference of light. Diffraction due to a single slit, width of central maximum. Resolving power of microscopes and astronomical telescopes. Polarisation, plane polarised light Brewster's law, uses of plane polarised light and Polaroids.

01:08:14

00:53:16

00:56:20

### Lecture 30: Wave Optics Part 4

00:32:52

Dual nature of radiation. Photoelectric effect, Hertz and Lenard’s observations; Einstein’s photoelectric equation-particle nature of light.

Matter waves-wave nature of particles, de Broglie relation. Davisson-Germer experiment
(experimental details should be omitted; only conclusion should be explained).

00:43:54

00:55:10

### Lecture 33: Dual Nature of Matter & Rediation Part 2

00:38:39

Alpha-particle scattering experiment; Rutherford’s model of atom; Bohr model, energy levels, hydrogen spectrum.

00:43:42

00:33:39

### Lecture 36: Atom part 3

00:43:57

Composition and size of nucleus, atomic masses, isotopes, isobars; isotones. Radioactivityalpha, beta and gamma particles/rays and their properties; radioactive decay law.

Mass-energy relation, mass defect; binding energy per nucleon and its variation with mass number; nuclear fission, nuclear fusion.

00:45:52

00:46:18

### Lecture 39: Nuclei Part- 3

00:41:37

Energy bands in conductors, semiconductors and insulators (qualitative ideas only)

Semiconductor diode - I-V characteristics in forward and reverse bias, diode as a rectifier;

Special purpose p-n junction diodes: LED, photodiode, solar cell and Zener diode and their characteristics, zener diode as a voltage regulator.

Junction transistor, transistor action, characteristics of a transistor and transistor as an amplifier (common emitter configuration), basic idea of analog and digital signals, Logic gates (OR, AND, NOT, NAND and NOR).

00:48:32

01:01:10

00:45:33

00:52:05

00:46:17

### Lecture 45: Semiconductor Part 5

01:04:42

Elements of a communication system (block diagram only); bandwidth of signals (speech, TV and digital data); bandwidth of transmission medium. Propagation of electromagnetic waves in the atmosphere, sky and space wave propagation, satellite communication. Need for modulation, amplitude modulation.

00:55:58

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### Lecture 3: Current Electricity

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Published    02-Mar-2017      Bilingual

## COMPLETE COURSE OF CBSE CLASS 12TH PHYSICS

Study Khazana delivers CBSE Class 12th Physics, Fifty five video lectures by Narender Singh on Chemistry Complete Course with complete solutions using sample paper based on NCERT Syllabus. This chapter covers the following topic to make students understand the topic and covers the whole chapter with all the question and answers.

## WHAT WE STUDY IN ELECTRIC CHARGES AND FIELDS?

• Electric Charges − §  Conservation of charge §  Coulomb’s law-force between two point charges §  Forces between multiple charges §  Superposition principle §  Continuous charge distribution
• Electric field, electric field due to a point charge, electric field lines, electric dipole, electric field due to a dipole, torque on a dipole in uniform electric field.
• Electric flux, statement of Gauss’s theorem and its applications to find field due to infinitely long straight wire, uniformly charged infinite plane sheet and uniformly charged thin spherical shell (field inside and outside).

## WHAT WE STUDY IN ELECTROSTATIC POTENTIAL AND CAPACITANCE?

• Electric potential, potential difference, electric potential due to a point charge, a dipole and system of charges
• Equipotential surfaces, electrical potential energy of a system of two point charges and of electric dipole in an electrostatic field
• Conductors and insulators, free charges and bound charges inside a conductor
• Dielectrics and electric polarisation, capacitors and capacitance, combination of capacitors in series and in parallel, capacitance of a parallel plate capacitor with and without dielectric medium between the plates, energy stored in a capacitor.

## WHAT WE STUDY IN CURRENT ELECTRICITY?

• Electric current, flow of electric charges in a metallic conductor, drift velocity, mobility and their relation with electric current
• Ohm’s law, electrical resistance, V-I characteristics (linear and non-linear), electrical energy and power, electrical resistivity and conductivity
• Carbon resistors, colour code for carbon resistors; series and parallel combinations of resistors; temperature dependence of resistance
• Internal resistance of a cell, potential difference and EMF of a cell, combination of cells in series and in parallel
• Kirchhoff’s laws and simple applications
• Wheatstone bridge, metre bridge
• Potentiometer − o   Principle and its applications to measure potential difference and for comparing EMF of two cells o   Measurement of internal resistance of a cell

## WHAT WE STUDY IN MOVING CHARGES AND MAGNETISM?

• Concept of magnetic field − o   Oersted’s experiment ·
• Biot - Savart law and its application to current carrying circular loop
• Ampere’s law and its applications to infinitely long straight wire
• Straight and toroidal solenoids
• Force on a moving charge in uniform magnetic and electric fields
• Cyclotron
• Force on a current-carrying conductor in a uniform magnetic field
• Force between two parallel current-carrying conductors-definition of ampere
• Torque experienced by a current loop in uniform magnetic field; moving coil galvanometer-its current sensitivity and conversion to ammeter and voltmeter.

## WHAT WE STUDY IN MAGNETISM AND MATTER?

• Current loop as a magnetic dipole and its magnetic dipole moment
• Magnetic dipole moment of a revolving electron
• Magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and perpendicular to its axis
• Torque on a magnetic dipole (bar magnet) in a uniform magnetic field − o   Bar magnet as an equivalent solenoid o   Magnetic field lines o   Earth’s magnetic field o   Magnetic elements
• Para-, dia- and ferro - magnetic substances, with examples
• Electromagnets and factors affecting their strengths
• Permanent magnets

## WHAT WE STUDY IN ELECTROMAGNETIC INDUCTION?

• Electromagnetic induction −
• Induced EMF and current
• Lenz’s Law
• Eddy currents
• Self and mutual induction.
·

## WHAT WE STUDY IN ALTERNATING CURRENT?

Alternating currents −
• Peak and RMS value of alternating current/voltage
• Reactance and impedance
• LC oscillations (qualitative treatment only)
• LCR series circuit
• Resonance
• Power in AC circuits
• Wattless current
• AC generator and transformer

## WHAT WE STUDY IN ELECTROMAGNETIC WAVES?

• Basic idea of displacement current, Electromagnetic waves, their characteristics, their transverse nature (qualitative ideas only).
• Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays) including elementary facts about their uses.

## WHAT WE STUDY IN RAY OPTICS AND OPTICAL INSTRUMENTS?

• Ray Optics − o   Reflection of light o   Spherical mirrors o   Mirror formula o   Refraction of light o   Total internal reflection and its applications o   Optical fibres o   Refraction at spherical surfaces o   Lenses o   Thin lens formula o   Lensmaker’s formula
• Magnification, power of a lens, combination of thin lenses in contact combination of a lens and a mirror
• Refraction and dispersion of light through a prism.
• Scattering of light - blue colour of sky and reddish appearance of the sun at sunrise and sunset
• Optical instruments: Microscopes and astronomical telescopes (reflecting and refracting) and their magnifying powers

## WHAT WE STUDY IN WAVE OPTICS?

• Wave optics: Wave front and Huygen's principle, reflection and refraction of plane wave at a plane surface using wave fronts
• Proof of laws of reflection and refraction using Huygen's principle
• Interference Young's double slit experiment and expression for fringe width, coherent sources and sustained interference of light
• Diffraction due to a single slit, width of central maximum
• Resolving power of microscopes and astronomical telescopes
• Polarisation, plane polarised light Brewster's law, uses of plane polarised light and Polaroids

## WHAT WE STUDY IN DUAL NATURE OF RADIATION AND MATTER?

• Photoelectric effect
• Hertz and Lenard’s observations
• Einstein’s photoelectric equation-particle nature of light
• Matter waves-wave nature of particles, de Broglie relation
• Davisson-Germer experiment (experimental details should be omitted; only conclusion should be explained).

## WHAT WE STUDY IN ATOMS?

• Alpha-particle scattering experiment
• Rutherford’s model of atom
• Bohr model
• Energy levels
• Hydrogen spectrum

## WHAT WE STUDY IN NUCLEI?

• Composition and size of −
• Nucleus
• Atomic masses
• Isotopes
• Isobars
• Isotones
• Radioactivity alpha, beta and gamma particles/rays and their properties
• Mass-energy relation −
• Mass defect
• Binding energy per nucleon and its variation with mass number
• Nuclear fission
• Nuclear fusion

## WHAT WE STUDY IN SEMI CONDUCTOR?

• Energy bands in conductors, semiconductors and insulators (qualitative ideas only)
• Semiconductor diode - I-V characteristics in forward and reverse bias, diode as a rectifier
• Special purpose p-n junction diodes: LED, photodiode, solar cell and Zener diode and their characteristics, zener diode as a voltage regulator
• Junction transistor, transistor action, characteristics of a transistor and transistor as an amplifier (common emitter configuration), basic idea of analog and digital signals, Logic gates (OR, AND, NOT, NAND and NOR).

## WHAT WE STUDY IN COMMUNICATION SYSTEM?

• Elements of a communication system (block diagram only) o   Bandwidth of signals (speech, TV and digital data) o   Bandwidth of transmission medium
• Propagation of electromagnetic waves in the atmosphere, sky and space wave propagation, satellite communication
• Need for modulation, amplitude modulation and frequency modulation, advantages of frequency modulation over amplitude modulation
• Basic ideas about internet, mobile telephony and global positioning system (GPS).

## HOW WE HELP THE STUDENTS?

These video lectures will make the subject easy for students. The free lecture is available as a demo. We provide mock exams after completion of the full course. These lectures are recording of the live session taken. It will include question and answers of the students undertaken during the class. CBSE Class 12th previous question papers and sample papers are also given to the students for practice. Video Lectures classes are taken by Study Khazana’s best faculties. Video lectures contain examples and formulas related to different topics. We have doubt sessions on YouTube related to students queries asked on WhatsApp. These classes are based on NCERT Syllabus. We also have Android and IOS Study Khazana mobile app for helping students to study anywhere at any time. #### Narender Singh

 Phone: 07********26 Email: nar********@gmail.com Address: C-9/31 SECTOR 15 ROHINI NEW DELHI Institute:

Hello Friends. I am Narender Singh Bobby. Faculty of Physics of Studykhazana. I will cover all the chapters of physics of Class XI and XII. I will provide you complete course with their mock test series with all the important questions. Moreover you can ask doubts or queries if any. I will always be their to help you.

##### Qualification

B.Sc Physics (H),B.ED

##### Biography

I AM TEACHING PHYSICS SINCE 2011

#### PHYSICS

Easily understanding with profesionals teachers

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