Find the best tutors and institutes for Class 12 Tuition

Find Best Class 12 Tuition

No matching category found.

No matching Locality found.

Outside India?

Search for topics

Write the expression for speed of electromagnetic waves in a medium of electrical permittivity ϵ and magnetic permeability μ.

Physics Tutor

Expressions for the electric and magnetic fields in free space contain the electric permittivity ε0 and magnetic permeability μ0 of free space. These two quantities are not independent but are related to "c", the speed of light and other electromagnetic waves. The magnetic constant μ0 =... read more

Expressions for the electric and magnetic fields in free space contain the electric permittivity ε0 and magnetic permeability μ0 of free space. These two quantities are not independent but are related to "c", the speed of light and other electromagnetic waves. The magnetic constant μ0 = 4π x 10-7 T m/A is called the permeability of space. The permeabilities of most materials are very close to μ0 since most materials will be classified as either paramagnetic or diamagnetic. But in ferromagnetic materials the permeability may be very large and it is convenient to characterize the materials by a relative permeability.
This contains the force unit N for Newton and the unit A is the Ampere, the unit of electric current.

With the magnetic permeability established, the electric permittivity takes the value given by the relationship

c = 1/sqrt(ε0μ0)

where the speed of light is given by

c=2.99792458 x 10^8 m/s (exact)

This gives a value of free space permittivity

ε0 = 8.854187817 x 10^-12 F/m

which in practice is often used in the form

k = 1/4piε0 = 8.987552 X10^9 Nm^2/C^2 = Coulomb's constant

These expressions contain the units F for Farad, the unit of capacitance, and C for Coulomb, the unit of electric charge.

The electric permittivity is connected to the energy stored in an electric field. It is involved in the expression for capacitance because it affects the amount of charge which must be placed on a capacitor to achieve a certain net electric field. In the presence of a polarizable medium, it takes more charge to achieve a given net electric field and the effect of the medium is often stated in terms of a relative permittivity.

Fond to play cricket

C= 1/√μ∈

Tutor

V=1/√μ∈

Mathematics & Statistics Teacher

C= 1/√μ∈

Physics Teacher

c=1/square root of (electrical permittivity ) c=velocity of light in vaccum. v=1/square root of (electrical permittivity in a medium in that medium) v=velocity of light in that medium read more

c=1/square root of (electrical permittivity$\times&space;magnetic&space;permeability$ )

c=velocity of light in vaccum.

v=1/square root of (electrical permittivity in a medium $\times&space;magnetic&space;permeability$ in that medium)

v=velocity of light in that medium

Fond to play cricket

Expression for speed can be derivied by following steps

Primary Teacher

C= 1/√μ∈

Tutor

C= 1/√μ∈

Related Questions

30 Mar
8
01 Mar
39

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Related Lessons

NEET : a possible dream
When I was in class Xi , I wonder seeing a doctor.It seems almost impossible.Its been five years from then ,I'm a final year MBBS student at CMC ,oldest medical College in whole Asia . It took me 2 years...

Electrostatics
Electrostatics made of two words Electrostatics= Electro + statics Electro means Electron (charge) statics means in rest position so we can say that Electrostatics is the branch of Physics in which...

Anil Kumar Singh | 20/10/2018

Accuracy and precision
Accuracy and precisionAccuracy is how close we can get to the actual value while precision is how much detailed our results are. E.g.- True value-3.45678 3.455 3.458 The first one is more accurate. Now...

Himanshu Pandey | 01/10/2018

Find Grade 12 Tuition near you

Looking for Class 12 Tuition ?

Find best Class 12 Tuition in your locality on UrbanPro.

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you

Find Best Class 12 Tuition ?

Find Now »

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 25 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 6.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more