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Forum index » Science and Technology » Physics » Electromagnetics
Electric Field Sources or Generators
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Old Man
science forum Guru Wannabe


Joined: 04 May 2005
Posts: 101

PostPosted: Tue Jun 28, 2005 12:52 am    Post subject: Re: Electric Field Sources or Generators Reply with quote

"emma" <mrandmrsrelativity@yahoo.com> wrote in message
news:1119905485.420796.301280@o13g2000cwo.googlegroups.com...
Quote:

To create source of magnetic field. You only need wires as
the current passing thru them can create it. The electric
field in the wires is null because there is a cancellation
inside the positive lattice and electrons.

I'd like to build a very strong source of electric field
only.

Moderate potential on a small conducting sphere. Point
of a needle. The sharp edge of a razor blade.

[Old man]

> emma
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Uncle Al
science forum Guru


Joined: 24 Mar 2005
Posts: 1226

PostPosted: Mon Jun 27, 2005 9:44 pm    Post subject: Re: Electric Field Sources or Generators Reply with quote

emma wrote:
Quote:

To create source of magnetic field. You only need wires as
the current passing thru them can create it. The electric
field in the wires is null because there is a cancellation
inside the positive lattice and electrons.

Rub your feet on the carpet during a dry day.

Quote:
I'd like to build a very strong source of electric field
only.

van de Graff generator (DC continuous). Wimshurst generator (DC
continuous or pulsed). Marx generator (DC pulsed). Tesla coil (kHz
AC). Snap together 100 transistor batteries in a row - that's 900 V
end to end (DC continuous).

Quote:
Can I use two big kitchen plates and connect each
of them to positive and negative of a car battery? Would
this create electric field in the middle.

Sure, 12 whole volts, except for the plates. 12 V can kill you.

Quote:
Pls. mention all sources that produce electric fields
with minimal magnetic field present. Beside the
capacitor concept. How else could you creates source
of electric field where the electrons charge become
bare and no cancellation from the atomic lattice.

Rub your feet on the carpet during a dry day.

Quote:
Does this mean there are positive and negative sources
of electric field that can be built using circuits.
For example, if you force out electrons from a certain
material, does it produce a positive electric field
from the positive ions left? What materials can do

You shouldn't be trusted with anything electrical until you have
something useful between your ears.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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Dave
science forum Guru Wannabe


Joined: 23 Apr 2005
Posts: 191

PostPosted: Mon Jun 27, 2005 7:07 pm    Post subject: Re: Electric Field Sources or Generators Reply with quote

"emma" <mrandmrsrelativity@yahoo.com> wrote in message
news:1119905485.420796.301280@o13g2000cwo.googlegroups.com...
Quote:

To create source of magnetic field. You only need wires as
the current passing thru them can create it. The electric
field in the wires is null because there is a cancellation
inside the positive lattice and electrons.

I'd like to build a very strong source of electric field
only. Can I use two big kitchen plates and connect each
of them to positive and negative of a car battery? Would
this create electric field in the middle.

yes

Quote:

Pls. mention all sources that produce electric fields
with minimal magnetic field present. Beside the
capacitor concept. How else could you creates source
of electric field where the electrons charge become
bare and no cancellation from the atomic lattice.


the most obvious ones are van de graff generators that can create very large
fields with a tiny current by moving electrons from one electrode to the
other.

Quote:

Does this mean there are positive and negative sources
of electric field that can be built using circuits.
For example, if you force out electrons from a certain
material, does it produce a positive electric field
from the positive ions left? What materials can do
this?


sure, any circuit that moves electrons creates an electric field. however
if you start with neutral matter you end up with symmetric positive and
negative charges, you can only separate them not create them separately.
any material can do this, its just easier with some than others and it
depends on what you are trying to do.
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mrand
science forum beginner


Joined: 19 Jun 2005
Posts: 5

PostPosted: Mon Jun 27, 2005 6:51 pm    Post subject: Electric Field Sources or Generators Reply with quote

To create source of magnetic field. You only need wires as
the current passing thru them can create it. The electric
field in the wires is null because there is a cancellation
inside the positive lattice and electrons.

I'd like to build a very strong source of electric field
only. Can I use two big kitchen plates and connect each
of them to positive and negative of a car battery? Would
this create electric field in the middle.

Pls. mention all sources that produce electric fields
with minimal magnetic field present. Beside the
capacitor concept. How else could you creates source
of electric field where the electrons charge become
bare and no cancellation from the atomic lattice.

Does this mean there are positive and negative sources
of electric field that can be built using circuits.
For example, if you force out electrons from a certain
material, does it produce a positive electric field
from the positive ions left? What materials can do
this?

Thanks.

emma
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Google

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