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  • Physics Class 12

Physics Class 12 Solutions, MCQ, Notes, Book FREE PDF Download

MCQ Physics Class 12

MCQ Physics Class 12

Important Questions Physics Class 12

Important Questions Physics Class 12

Notes Physics Class 12

Notes Physics Class 12

Previous Year Papers Physics Class 12

Previous Year Papers Physics Class 12

Sample Papers Physics Class 12 FREE PDF Download

Sample Papers Physics Class 12

Syllabus Physics Class 12

Syllabus Physics Class 12

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Book Physics Class 12

Marking Scheme Physics Class 12

Marking Scheme Physics Class 12

 

Notes Class 12 Physics Chapter 15 Communication Systems

Notes For All Chapters Physics Class 12 Topic 1 Communication 1. Communication Communication is the act of transmission and reception of information. 2. Communication System A system comprises of transmitter, communication channel and receiver. A block diagram of a generalised communication system is shown as below: 3. Transmitter It consists of transducer/signal generators, modulators and transmitting antenna. 4. […]

Notes Class 12 Physics Chapter 14 CBSE

Semiconductor Electronic: Material, Devices And Simple Circuits Notes For All Chapters Physics Class 12 1. Metals They possess very low resistivity or high conductivity. ρ ~ 10-2.10-8 Ωm, σ ~102. 108 Sm-1 2. Semiconductors They have resistivity or conductivity intermediate to metals and insulators. ρ ~ 10-5. 106 Ωm, σ ~ 10+5 .10-6 Sm-1 Types of Semiconductors Types of semiconductors are given […]

Notes Class 12 Physics Chapter 13 Nuclei

Notes For All Chapters Physics Class 12 CBSE 1. In every atom, the positive charge and mass are densely concentrated at the centre of the atom forming its nucleus. More than 99.9% mass of the atom is concentrated in the nucleus. 2. Atomic Mass Unit (amu) The unit to express atomic masses is called atomic mass unit. […]

Notes Class 12 Physics Chapter 12 Atoms

Notes For All Chapters Physics Class 12 CBSE 1. All elements consists of very small invisible particles, called atom. Every atom is a sphere of radius of the order of 10-10 m, in which entire mass is uniformly distributed and negative charged electrons revolve around the nucleus. 2. Experimental arrangement for α-scattering experiment and trajectory followed by α […]

Notes Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter

Notes For All Chapters Physics Class 12 CBSE 1. Photoelectric Effect The phenomenon of emission of photoelectron from the surface of metal, when a light beam of suitable frequency is incident on it, is called photoelectric effect. The emitted electrons are called photoelectrons and the current so produced is called photoelectric current. Hertz’ Observation The phenomenon of […]

Notes Class 12 Physics Chapter 10 Wave Optics

Notes For All Chapters Physics Class 12 CBSE 1. Wave Optics Describes the connection between waves and rays of light. According to wave theory of light, light is a form of energy which travels through a medium in the form of transverse wave. 2. Wave front The locus of all those particles which are vibrating in the […]

Notes Class 12 Physics Chapter 9 Ray Optics and Optical Instruments

Notes For All Chapters Physics Class 12 CBSE 1. Ray Optics or Geometrical Optics In this optics, the light is considered as a ray which travels in a straight line. It states that for each and every object, there is an image. 2. Reflection Reflection is the phenomenon of changing the path of light without any change […]

Notes Class 12 Physics Chapter 8 Electromagnetic Waves

Notes For All Chapters Physics Class 12 CBSE 1. Displacement Current The current which comes into play m the region in which the electric field and the electric flux is changing with time. It is given by 2. Need for Displacement Current Ampere’s circuital law for conduction current during charging of a capacitor was found inconsistent. Therefore, […]

Notes Class 12 Physics Chapter 7 Alternating Current

Notes For All Chapters Physics Class 12 CBSE 1. Alternating Current (AC) It is the current which varies in both magnitude as well as direction alternatively and periodically. I = I0 sin ωt or I = I0 cosωt where, I0 = peak value or maximum value of AC. 2. Effective Value or rms Value of AC It is defined as […]

Notes Class 12 Physics Chapter 6 Electromagnetic Induction

Notes For All Chapters Physics Class 12 CBSE 1. Magnetic Flux The magnetic flux linked with any surface is equal to total number of magnetic lines of force passing normally through it. It is a scalar quantity. 2. The phenomenon of generation of current or emf by changing the magnetic flux is known as Electromagnetic Induction EMI). […]

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