Electrostatics

0 : 0

16 : 1

1 : 4

4 : 1

Each charge contributes individually squared distance away

Resultant horizontal forces cancel vertical components combined via Pythagorean theorem

Dominant influence comes from closest pair leading to attraction toward them

Net force directed towards center since like-charges repel opposites attract

$+\frac{kq^2(9\sqrt{3}+4)}{4d}$

$-\frac{kq^2(9\sqrt{3}-4)}{4d}$

$+\frac{kq^2(9+\sqrt{3})}{4d}$

$-\frac{kq^2(9-\sqrt{3})}{4d}$

Volt (V).

Ohm (Ω).

Coulomb (C).

Ampere (A).

Spiral moving outward from origin remaining in xy-plane.

Linear path making equal angles with x and y axes.

Straight line parallel to x-axis.

Circular path centered on origin lying in xy-plane.

$U = k , \frac{(q_{1} , q_{2})^{1/2}}{r^{2}}$

$U = \frac{k , q_{1} , q_{2}}{r}$

$U = k , \frac{(q_{1} - q_{2})}{r^{2}}$

$U = k , (q_{1} + q_{2}) , r$

The material between the plates only.

The distance between the charges only.

The speed at which charges move through the circuit.

The charge on the plates and the area of the plates.

Increases or decreases the voltage of alternating current.

Provides resistance to control the flow of electric current.

Converts electrical energy into mechanical work.

Stores electrical energy in an electric field.

There must be a positive charge located exactly at that point.

The electric field must have a high magnitude directed toward a negative charge.

There is an equal amount of positive and negative charge cancelling each other out exactly at that point.

The electric field is zero but there may still be charges nearby.

It fluctuates periodically.

It increases.

It remains constant.

It decreases.