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The simplest method of creating a uniform electric field in a region is to keep two equally charged thin plain metal sheets of opposite charge parallel to each other. As you can see from the derivation for electric field due to a plain sheet of charge, the electric field due to a plain sheet of charge is independent of distance (provided the distance is not large compared to the dimensions of the plain sheet of charge).
So, if you keep two plain metal sheets of same charge densities but opposite kind of charge, we get a fairly good uniform electric field in between the plates.
At regions close to a uniformly charged thin sheet also we get a uniform electric field, but as distance increases it may tend to become non uniform.
It may be rather silly but still I’m really curious to know about this. What is charge basically? I’m tired of reading and hearing charge is an inherent property of matter, it is that which causes electric field etc.
First of all, I would like to tell that I am interested mainly in such questions which are branded silly. But many of those silly branded questions are not so silly.
Charge is defined in intermediate Physics as below
“Electric charge is the physical property of matter that causes it to experience a force when close to other electrically charged matter. “
The concept of electric field was introduced by Faraday to explain how two charges exert force on each other without physical contact. A charged particle (and also a time varying magnetic field) produces an electric field.
According to Physics opposite charges always attract But in an atom the distance between nucleus and electrons are small then why electrons didnt combined with protons? protons and electrons have opposite charges.But why they didnt combined each other?
KS Samy answers:
the minimum distance between nucleus and orbital electron have minimum energy, as well as large distance it as more energy.”
Two equal negative charge -q are fixed at the point (0,a) & (0,-a) on yhe y-axis. a positive charge Q is released from rest at the point (2a,0) on the x-axis. the charge Q will execute oscillatory motion how?
Which has greater ionization power alpha or beta?
(Question received via speak pipe – a facility for the visitors to ask questions orally, if you have a mic)
Alpha particles have greater ionization power as they have two units of positive charge and 4 units of mass, whereas beta has only one unit of negative charge and negligible mass as compared to alpha.
We know that the potential developed at a point by a charge is the negative of the work done to bring a unit charge at that point from infinity. But how does a conducting plate develop a potential? what is the work done?
I can smell some misconceptions in your question. It is better to revise the question after revising the topic on Elelctric Potential thoroughly.
When a conducting plate is charged, it is raised to some potential. Only to bring the first point charge to the plate, the work done is zero, but afterwards, repulsion is developed between the charge brought and the charge already present on the plate and therefore work is required to be done to increase the charge on the plate.
(Please revise the portions well and review the question asked)
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