Electromagnetic Fields and Waves
What is Electromagnetic spectrum?
It is the range of all type of EMF radiation or In other words it is the complete frequency distribution of electromagnetic radiation and it is divided into various parts such as visible light, infrared light, or ultraviolet radiation.
What is EMF?
It stands for Electro Motive Force which is created by Electromagnetic Induction by way of moving magnetic field around electric conductor. It is also called electric potential and denoted as ε.
State Faradays First Law of Electromagnetism?
It states that whenever a current carrying conductor is placed in a varying magnetic field, EMF is induced in it.
Mention any three applications of Ultra-Violet radiations?
- Kills bacteria.
- Water purification.
- Phototherapy.
What are the uses of radio waves and microwaves ?
- In Radio waves – Radio and Television purpose.
- In Microwave – Satellite communications.
What is Electromagnetic Field ?
As we all know, a field is nothing but a physical quantity that’s assigned to every point in space. The electromagnetic field is a combination of electrical and magnetic phenomena that exist in space and it is also created by the motion of charges (electric field) which creates a magnetic field. In simple terminology electromagnetic field is a wave that transports electromagnetic energy with the speed of light. It is a scalar quantity that has only a magnitude not direction associated with it. It is a field described by classical thermodynamics. Maxwell’s law and Lorentz’s force law describe how electric charges constitute current and interact with a magnetic field. Here the important point to catch is without electromagnetic waves we can’t generate electromagnetic fields so both these terms are dependent on each other.
Table of Content
- Electromagnetic Field
- Electromagnetic Waves
- Equations
- Properties
- Categorization
- Mathematical Representation
- Properties
- Applications
- Electric Field (E) Vs Magnetic Field (B)