# Best answer: How do you find the electric field ratio?

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… directly proportional to the average electric field strength E so that the ratio of the two, P/E, is a constant that expresses an intrinsic property of the material. The electric susceptibility, χe, in the centimetre-gram-second (cgs) system, is defined by this ratio; that is, χe = P/E.

## How do you calculate electric field lines?

The electric field strength is exactly proportional to the number of field lines per unit area, since the magnitude of the electric field for a point charge is E=k|Q|r2 E = k | Q | r 2 and area is proportional to r2.

## How do you find r in Coulomb’s law?

r is the shortest distance between the charges (in m), ke is the Coulomb’s constant. It is equal to 8.98755 × 10⁹ N·m²/C² .

## How do you find the electric field in physics?

The electric field E is defined to be E=Fq E = F q , where F is the Coulomb or electrostatic force exerted on a small positive test charge q. E has units of N/C. The magnitude of the electric field E created by a point charge Q is E=k|Q|r2 E = k | Q | r 2 , where r is the distance from Q.

## Where is the strongest electric field?

Electric field strength is greatest where the lines are closest together and weakest where lines are furthest apart.

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## Why are electric field lines curves?

Yes, the electrostatic field line is a continuous curve because a unit charge always experiences a continuous force when it is placed in an electrostatic field. The unit charge is the charge that passes through the cross-section of an electric conductor that carries one ampere of current in one second.

## What is C in electric?

Coulomb, unit of electric charge in the metre-kilogram-second-ampere system, the basis of the SI system of physical units. It is abbreviated as C. The coulomb is defined as the quantity of electricity transported in one second by a current of one ampere.

## What is the R in Coulomb’s law?

It’s a formula that measures the electrical forces between two objects. “F” is the resulting force between the two charges. The distance between the two charges is “r.” The “r” actually stands for “radius of separation” but you just need to know it is a distance.

## What is called electric field?

Electric field, an electric property associated with each point in space when charge is present in any form. The magnitude and direction of the electric field are expressed by the value of E, called electric field strength or electric field intensity or simply the electric field.

## How is an electric field generated?

The electric force acts over the distance separating the two objects. … The space surrounding a charged object is affected by the presence of the charge; an electric field is established in that space. A charged object creates an electric field – an alteration of the space or field in the region that surrounds it.

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## What is the electric field intensity of e midway between the 2 charges?

The electric field midway between any two equal charges is zero, no matter how far apart they are or what size their charges are.

## 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 point charge in electric field?

Key Points

Given a point charge, or a particle of infinitesimal size, that contains a certain charge, electric field lines emanate from equally in all radial directions. If the point charge is positive, field lines point away from it; if the charge is negative, field lines point toward it.