Physics Chapter 19

What are the ways to increase the total capacitance of a circuit?

arrange capacitors in parallel, larger surface area, plates closer together

The ratio of the charge (Q) on a conductor and potential difference (V)

capacitance

Two devices ideal for storing electric charge are the _____ and the _____.

capacitor and Leyden jar

What is the total capacitance of three 4.00 µF capacitors if they are connected in series?

5.33

Which statement about electric lines of force is not true? Lines of force are perpendicular to the electric field strength vector. Lines of force point toward negative charges. The closer the lines of force, the stronger the electric field Field lines never cross one another.

Lines of force are perpendicular to the electric field strength vector.

The work done moving a positive test charge between two points in an electric field determines the ___.

electrical potential difference

An area surrounding a charged object in which there is no change in electric potential is known as a(n) _____.

equipotential surface

(T/F) Doubling the number of identical capacitors connected in series doubles the capacitance of the circuit.

false

(T/F) Electric fields are two-dimensional representations of electrical force.

false

(T/F) Lines of force can actually cross each other where the electrical fields are exceptionally strong.

false

The SI unit of capacitance

farad

Capacitor dielectrics are what kind of material?

insulators

Electric lines of force end at _____ charges.

negative

An electric field test charge is assumed to a(n) _____ charge.

positive

The work required to move a point charge from one location in an electric field to another equates to the _____ between those locations.

potential difference

What is true about the direction of the force on a positive test charge and the direction of the electric field?

same direction

What is the function of a capacitor?

store electric charge

(T/F) Electric field lines are continuous from one charge to an opposite charge.

true

(T/F) Electrical potential has the same unit as potential difference.

true

Name the essential parts of a capacitor.

two parallel plates & a dialectric/insulator

Electric field strength is a ___ quantity.

vector