## What happens to the force between two charged objects as the distance between them changes?

In electrostatics, the electrical force between two charged objects is inversely related to the distance of separation between the two objects. Increasing the separation distance between objects decreases the force of attraction or repulsion between the objects. Electrical forces are extremely sensitive to distance.

## Does the electric force increases as objects move closer together?

The law looks at the forces created between two charged objects. As distance increases, the forces and electric fields decrease. You also need to understand that forces between objects become stronger as they move together and weaker as they move apart.

## What happens to the electric force if I double the charge?

According to Coulomb, the electric force for charges at rest has the following properties: Like charges repel each other; unlike charges attract. Therefore, if the distance between the two charges is doubled, the attraction or repulsion becomes weaker, decreasing to one-fourth of the original value.

## 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 do you calculate 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 does a negative charge move in an electric field?

A positive charge placed in an electric field will tend to move in the direction of the electric field lines and a negative charge will tend to move opposite to the direction of the electric field lines.

## Why must electrostatic field be normal to the surface?

Electric field is defined as the gradient of potential and the surface of a conductor has a constant potential. Therefore, there is no field along the surface of the conductor and hence the electrostatic field at the surface of a charged conductor should be Normal to the surface at every point.