12th physics online class and notes -Electromagnetic Waves

Physics notes for class 12 : How are Electromagnetic waves produced?

Electromagnetic waves are produced by an accelerated or de-accelerated charge or LC circuit.

Transverse Nature of Electromagnetic waves:The Electromagnetic waves are transverse in nature with the electric and magnetic fields perpendicular to the direction of propagation.

Electromagnetic waves: The waves propagating in space through electric and magnetic fields varying in space and time simultaneously are called electromagnetic waves.

An electromagnetic wave consists of a fluctuating electric field and a fluctuating magnetic field of the same frequency and the same phase.
The electric and magnetic fields are mutually perpendicular and also perpendicular to the direction of propagation of the wave.
In the propagation of an electromagnetic wave, a varying electric field E gives rise to a varying magnetic field and so on. In this way, electric and magnetic fields of the wave sustain each other.

Characteristics of electromagnetic waves:

The electromagnetic waves travel in free space with speed of light irrespective of their wave length.
Electromagnetic waves are transverse in nature.
Electromagnetic waves do not need a material medium for their

propagation.

Electromagnetic waves are produced by accelerated charges.
Electromagnetic waves obey the principle of superposition.

Electromagnetic waves are neutral so they are not deflected by electric and magnetic fields.
The ratio of magnitudes of electric and magnetic field vectors in free space is constant and equal to c

ie c = E/B = 3×108m/s

Electromagnetic waves show properties of reflection, refraction, interference,

diffraction and polarisation.

For more NCERT physics class 12 articles, video lectures, NCERT Solutions for class 12, sample papers, CBSE Guide, updates on CBSE board exams, enroll with Takshila Learning

Comments

Magnetic and non-magnetic material Class 6 Science

Magnetic and non-magnetic material Class 6 Science A magnet is a substance that is drawn to certain magnetic materials like iron, cobalt, and nickel. Magnets have the ability to draw iron to them. Natural magnets are rocks that naturally draw iron. Non-magnetic materials include things like wood, rubber, coins, feathers, leather, etc. that are not drawn to iron. Magnet characteristics It pulls magnetic materials, such as iron. The magnet's two ends are referred to as its poles. The magnet's diametrically opposed poles are drawn together. Heating, hammering, or dropping causes it to lose its characteristics. On the basis of properties types of Magnets Temporary magnets are those magnets that are magnetic for only a little duration. Typically, iron, cobalt, or nickel are used to make them. When they are close to the powerful magnet, they act like a magnet. When they are yanked away from the powerful magnet, they stop being magnetic. Permanent magnets are magnets that have magne...

Best Sample papers for Bank PO Exam Download

Sample papers for Bank PO Exam | Question Paper for Bank PO : Institute of banking Personnel Selection (IBPS) Department issued a Notification of IBPS PO 2017 exam announced in October month. IBPS Probationary Officer (PO) Online Application Form process will be begin from July 2017. This is a hard exam for all students so aware of its value. Large number of candidates will participate in this exam. So all candidates should prepare well for it. Check out IBPS, Bank PO Sample papers, Question Paper Pattern, SBI PO Syllabus , IBPS Syllabus and other IBPS PO Preparation 2017 This paper is identical to any Bank PO Question Paper Pattern. Check whole IBPS Bank “PO question paper” subject wise. IBPS (PO) Paper Pattern Analysis with Syllabus and main topics of IBPS Exam 2017. PO Question Paper Pattern, Bank PO sample Papers for IBPS Bank Exam IBPS PO Exam will be conducted at three levels 1st- PO Preliminary Exam 2nd- PO Mains Exam 3rd- PO Common ...

Online/Offline CBSE Coaching Classes for class 9

CBSE Coaching Class 9 :- In a move to make the digital India and Skill India dream into a reality, we are providing the best courses to our students in e-learning mode. Our program consists of entire 9th class syllabus in a fun learning method with various ways like sounds and animations. Our content is in 2-D & 3-D animation for better understanding of students. So That students will be understand every thing clearly and it makes the learning easy and entertaining. We are offering the following subjects for class 9th Standard: Maths Class Physics Class Chemistry Class Biology Class Our E-learning provides the best and trained teachers with highly qualified for the respective subjects, they help to improve the students’ performance and to teach the every concept clear and easy in better way. Our main motive is to help students to learn well and gain more marks with making their basic concept strong and good knowledge base ...

Takshila Learning - Online Tutorials

Search This Blog