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The electrostatic force exerted by a point charge on a test charge at a distance r depends on the charge of both charges, as well as the distance between the two. 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.

## What is the formula to find electric field?

In vector calculus notation, the electric field is given by the negative of the gradient of the electric potential, E = −grad V. This expression specifies how the electric field is calculated at a given point. Since the field is a vector, it has both a direction and magnitude.

## How do you find the electric field between two plates?

Since the field lines are parallel to each other, this type of electric field is uniform and has a magnitude which can be calculated with the equation E = V/d where V represents the voltage supplied by the battery and d is the distance between the plates.

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

There is no charge at the origin. In the formula E = kQ/r^{2}, Q is the charge that is producing the electric field. Each of the two charges that are given in the problem is producing electric field at the origin.

## How do you find electric field with distance and charge?

the magnitude of the electric field (E) produced by a point charge with a charge of magnitude Q, at a point a distance r away from the point charge, is given by the equation E = kQ/r^{2}, where k is a constant with a value of 8.99 x 10^{9} N m^{2}/C^{2}.

## How do you find the electric field in Class 12?

Electric Field

- SI unit of electric field is N/C (Force/Charge).
- Electric field due to a charge at a point is the force that a unit positive charge would experience if placed at that point.
- The charge generating electric field is called source charge and the charge which experiences this field is called test charge.