Chapter 12 - Electrostatics

These flashcards cover key concepts from the lecture on electrostatics, including Coulomb's law, electric field intensity, Gauss's law, electric potential, and applications of electrostatics.

Coulomb's law states that the force between two point charges is directly proportional to the product of the magnitudes of charges and __________ proportional to the square of the distance between them.

inversely

In electrostatics, a charge has a __________ of force around it.

field

Like charges __________ each other, while unlike charges __________ each other.

repel; attract

The electric intensity in a medium with relative permittivity εr is given by __________.

F = rac{1}{4 ext{π} ext{ε}_0}rac{q_1q_2}{ ext{r}^2} ext{ε}_r

Gauss's law states that the flux through any closed surface is 1/ε₀ times the __________ enclosed in it.

total charge

The expression for electric potential at a point due to a point charge is given by __________.

V = rac{1}{4 ext{π} ext{ε}_0} rac{q}{r}

The __________ of a capacitor is given as C = rac{Q}{V} where Q is the charge and V is the potential difference.

capacitance

The principle behind inkjet printers is an application of __________ phenomena.

electrostatic

When a unit positive charge is brought from infinity to a point in an electric field, the work done in this process is defined as __________.

the electric potential at that point

Dielectric materials increase the capacitance of capacitors due to the __________ effect of molecules within the dielectric material.

polarization