# Where is electric field maximum in a ring?

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A ring of radius (r) is located in the (x-y) plane is given a total charge (Q=2pi Rlambda). Show that (E) is maximum when the distance (z=r/sqrt{2}).

## How do you find the maximum value of an electric field?

Formula used: \$E=dfrac{kqx}{{{left( {{x}^{2}}+{{R}^{2}} right)}^{dfrac{3}{2}}}}\$ where R is radius of circle, E is electric field intensity, q is a charge and x is the distance between the center of ring and the field intensity.

## What is the electric field due to a ring?

A ring of radius R has charge -Q distributed uniformly over it. Calculate the charge (q) that should be placed at the center of the ring such that the electric field becomes zero at a point on the axis of the ring distant R from the center of the ring. The value of q is (Q/4) x ​.

## Is there an electric field inside a ring?

You are correct that the electric field is only zero at the exact center of the ring. Gauss’s law and Coulomb’s law always both give the same results in every situation, so if you’re getting that they disagree, then you made a mistake.

## What is electric field formula?

Electric field can be considered as an electric property associated with each point in the space where a charge is present in any form. An electric field is also described as the electric force per unit charge. The formula of electric field is given as; E = F /Q.

## Can electric field be negative?

Electric field is not negative. It is a vector and thus has negative and positive directions. An electron being negatively charged experiences a force against the direction of the field. For a positive charge, the force is along the field.

## What is Sigma in electric field?

Surface charge density (σ) is the quantity of charge per unit area, measured in coulombs per square meter (C⋅m2), at any point on a surface charge distribution on a two dimensional surface.

## What is K in electric field?

The Coulomb constant, the electric force constant, or the electrostatic constant (denoted ke, k or K) is a proportionality constant in electrostatics equations. In SI units it is equal to 8.9875517923(14)×109 kg⋅m3⋅s2⋅C2.

## What is the electric field at the center of a disk?

What is the electric field at the centre of a disc? – Quora. The value of the electric field at the centre of the disc is 2ϵ0​σ​. With respect to the field at the centre, the electric field along the axis at a distance R from the centre of the disc.

## What is electric field intensity?

A measure of the force exerted by one charged body on another. Imaginary lines of force or electric field lines originate (by convention) on positive charges and terminate on negative charges.

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## Why is the electric field inside a ring zero?

In electrostatics free charges in a good conductor reside only on the surface. So the free charge inside the conductor is zero. So the field in it is caused by charges on the surface. Since charges are of the same nature and distribution is UNIFORM, the electric fields cancel each other.

## Why is the electric field inside a sphere zero?

It follows that: The electric field immediately above the surface of a conductor is directed normal to that surface. … Now, the gaussian surface encloses no charge, since all of the charge lies on the shell, so it follows from Gauss’ law, and symmetry, that the electric field inside the shell is zero.

## Why is electric field at Centre of Ring zero?

What is the magnitude of the electric field at the center of a ring of charge of radius a? Assume there is a charge Q uniformly distributed over the ring. The field from one side of the ring cancels the field from the other, so the net field at the center is zero.