Electric Field Strength and Coulomb's Law

the force applied per unit charge on an object

NC-1 or Vm-1, and yes, they are interchangeable

the direction a positive charge would accelerate at that point

<p>Coulomb's law states that the electrostatic force between two point charges is proportional to the product of their charges and inversely proportional to the square of the distance between them</p> Signup and view all the answers

<p>k = 8.99 × 10^9 Nm^2 C^-2</p> Signup and view all the answers

<p>ε₀ = 8.85 × 10^-12 Fm^-1</p> Signup and view all the answers

<p>F = kQq / r^2</p> Signup and view all the answers

<p>Radial</p> Signup and view all the answers

<p>Repulsive</p> Signup and view all the answers

<p>Inversely proportional to the square of the distance</p> Signup and view all the answers

<p>No dependence on position</p> Signup and view all the answers

<p>Inversely proportional to the square of the distance</p> Signup and view all the answers

<p>The product of the force and the distance over which the force acts</p> Signup and view all the answers

<p>Always attractive</p> Signup and view all the answers

<p>Permittivity is a constant that defines the ability of a material to become polarized and store charge.</p> Signup and view all the answers

<p>The permittivity of free space is the permittivity of a vacuum, and it is the lowest value possible because there is no matter in a vacuum to become polarized.</p> Signup and view all the answers

<p>The permittivity of a material can be written as a constant, the relative permittivity, 𝜀𝜀𝑟𝑟, multiplied by the permittivity of free space.</p> Signup and view all the answers

<p>The purpose of introducing a small test charge is to determine the electric field strength on the test charge without causing the point charge to move.</p> Signup and view all the answers

<p>The formula is 𝐸𝐸 = 𝐹𝐹 / (𝑞𝑞 𝑄𝑄) = 1 / (4𝜋𝜋𝑟𝑟 2 𝜀𝜀0)</p> Signup and view all the answers

<p>Both gravitational and electric fields are fields that describe the force of attraction between objects.</p> Signup and view all the answers

<p>It is useful to explore the concept of a field by comparing gravitational and electric fields because it helps to highlight the similarities and differences between the two.</p> Signup and view all the answers

<p>The work done per unit charge to bring a positive charge from infinity to that point.</p> Signup and view all the answers

<p>V = Ed</p> Signup and view all the answers

<p>Because the electric field must be constant over the distance the charge moves.</p> Signup and view all the answers

<p>VB - VA</p> Signup and view all the answers

<p>The work done per unit charge in moving a charge from one point to another in the field.</p> Signup and view all the answers

<p>0</p> Signup and view all the answers

<p>V/d</p> Signup and view all the answers

<p>The work done by a force over a distance.</p> Signup and view all the answers

<p>W = Qq / (4πr²ε₀)</p> Signup and view all the answers

<p>Qq / (4πr²ε₀)</p> Signup and view all the answers

<p>The electrical potential energy per unit charge.</p> Signup and view all the answers

<p>V = Q / (4πrε₀)</p> Signup and view all the answers

<p>It shows the relationship between electric potential and distance from a point charge.</p> Signup and view all the answers

<p>Volts (V)</p> Signup and view all the answers

<p>The electric potential decreases as the distance from the point charge increases.</p> Signup and view all the answers

<p>It allows us to calculate the energy required to move a charge from one point to another.</p> Signup and view all the answers

<p>The electric potential energy is the energy required to move a charge in an electric field.</p> Signup and view all the answers