Chat with tutor

Ask Questions, Get Answers

Questions  >>  CBSE XII  >>  Physics  >>  Magnetism and matter

<span id="docs-internal-guid-bbc25f1a-112d-4049-43e7-abd6c8b4943a"><span style="font-size: 10pt; fon

State Gauss’s law in magnetism.What are its important consequences?

1 Answer

Gauss’s law in electrostatics states that the surface integral of the electrostatic field E(vector) over a closed surface S is equal to $\large\frac{1}{\in_0}$  times the total charge q enclosed by the surface S, $\int E(vector)*ds(vector)=q/ \in_0$ Suppose that the closed surface S encloses an electric dipole which consists of two equal and opposite charges.Then the total charge enclosed by is zero dipole over the closed surface is also zero. $\int E(vector)*ds(vector)$= zero  Now a magnetic field is produced only by a magnetic dipole because isolated magnetic poles do not exist,so the above  equation for a magnetic field can be written as $\int B(vector)*ds(vector)=0 This is Gauss’s law in magnetism which states that the surface of a magnetic field over a closed surface is always one .But the surface integral of a magnetic field over a surface gives magnetic flux through that surface.So gauss’s in magnetism can be stated as follows: The net magnetic flux through a closed surface is zero  Consequences of Gauss’s law:1.Gauss’s law indicates that there are no sources or sinks of magnetic field inside a closed surface .So there is no point at which the field lines terminate.In other words,there are no free magnetic charges.Hence isolated magnetic poles do not exist. 2.The magnetic poles always exist as unlike pairs of equal strengths. 3.If a number of magnetic lines of force enter a closed surface,then an equal number of lines of force must leave that surface.
Help Clay6 to be free
Clay6 needs your help to survive. We have roughly 7 lakh students visiting us monthly. We want to keep our services free and improve with prompt help and advanced solutions by adding more teachers and infrastructure.

A small donation from you will help us reach that goal faster. Talk to your parents, teachers and school and spread the word about clay6. You can pay online or send a cheque.

Thanks for your support.
Please choose your payment mode to continue
Home Ask Homework Questions
Your payment for is successful.
Clay6 tutors use Telegram* chat app to help students with their questions and doubts.
Do you have the Telegram chat app installed?
Already installed Install now
*Telegram is a chat app like WhatsApp / Facebook Messenger / Skype.