# What is the expression for electric field?

Contents

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.

## What is the symbol for electric field?

Symbols for physical quantities and their international units

symbol quantity symbol
E, E electric field N/C, V/m
ΦE electric flux N m2/C, V m
U, UE potential energy, electric potential energy J
V, VE voltage, potential, electric potential V

## What is the formula for calculating electric field?

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/r2, where k is a constant with a value of 8.99 x 109 N m2/C2.

## What is electric field Class 12?

Electric field is a force produced by a charge near its surroundings. This force is exerted on other charges when brought in the vicinity of this field. … Electric field due to a charge at a point is the force that a unit positive charge would experience if placed at that point.

## What are electric field lines Class 12?

An electric field line is an imaginary line or curve drawn from a point of an electric field such that tangent to it (at any point) gives the direction of the electric field at that point.

## What is V KQ R?

v=kq/r means potential at r distance from and by q charge. potential due to point charge at r distance. now about v=w/q it is another definition of voltage :- force acting at distance by unit charge. w = work = force×distance.

## What is the unit of an electric field?

The value of the electric field has dimensions of force per unit charge. In the metre-kilogram-second and SI systems, the appropriate units are newtons per coulomb, equivalent to volts per metre.

## What is the electric field at the origin?

The electric field resulting from a point charge q at the origin has magnitude kq/r² (where k is Coulomb’s constant) and direction away from the origin if q>0.

## What is electric field Class 10 Ncert?

Hint: In this question use the definition of electric field which states that it is the region around a charged particle or object within which another charged particle will experience a force over it, this force can be either a force of attraction or a force of repulsion.

## What is electric field in Brainly?

Textbook solution

Electric Field: An electric field is the physical field that surrounds each electric charge and exerts a force on all other charges in the field, either attracting or repelling them. Electric fields originate from electric charges, or from time-varying magnetic fields. Unit: ﻿ Voltm−1(Vm−1)

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## What is electric field in chemistry?

In atomic physics and chemistry, for instance, the electric field is the attractive force holding the atomic nucleus and electrons together in atoms. It is also the force responsible for chemical bonding between atoms that result in molecules.

## What is electric field and electric field lines?

An electric field line is an imaginary line or curve drawn through a region of empty space so that its tangent at any point is in the direction of the electric field vector at that point. The relative closeness of the lines at some place gives an idea about the intensity of electric field at that point.

## How do you define a field line in Class 10?

Magnetic Field lines are imaginary lines along which North Magnetic Pole would move. In a bar magnet, the magnetic field lines look like. These are lines which shows direction of Magnetic Force and its strength. These are curved lines which start from North Pole of Magnet and Moves Towards South Pole.

## What is electric field lines and write its properties?

Properties of Electric Field Lines. The field lines never intersect each other. The field lines are perpendicular to the surface of the charge. The magnitude of charge and the number of field lines, both are proportional to each other.