Module 13: Colomb's Law and the Electric Field

Question 1

Define electrostatics

Answer 1

The study of electric charges at rest

Question 2

Define Conductor

Answer 2

A substance through which charge flows easily

Question 3

Define insulator

Answer 3

A substance through which charge cannot flow

Question 4

What charges repel each other?

Answer 4

Like charges (positive and a positive/negative and a negative)

Question 5

Define the Law of Charge Conservation

Answer 5

The net amount of electric charge in the universe is constant

Question 6

Define Charging by Conduction

Answer 6

Charging an object by allowing it to come into contact with an object that already has an electric charge

Question 7

Define Charging by Induction

Answer 7

Charging an object without direct contact between the object and a charge

Question 8

Define Electrostatic force

Answer 8

The force that exists between two charges at rest

Question 9

What is the equation for Coulomb’s law of electrostatic force between two charges objects

Answer 9

F=kq(1)q(2)/r^2

F= the magnitude of the electrostatic force
K= physical constant
(9.0x10^9 Newton • m^2/C^2)
q1= the charge of one of the two objects
q2= the charge of the other object
r= the distance between the centers of the objects

Question 10

The three rules for drawing electric field lines

Answer 10

1. The relative number of electric field lines drawn is proportional to the charge of the particle creating the field.
2. The arrows that form the electric field lines point out of positive charges in into negative charges
3. Electric field lines can never cross

Question 11

What is the electric field equation?

Answer 11

E=F/q(o)

E= The electric field at a given point in space
F= The electrostatic force experienced by a positive test charge that is placed in the field
q(o)= The magnitude of the positive test charge

Question 12

What is the electric field equation for single stationary charge?

Answer 12

E=kQ/r^2

Q= to calculate the electric field

You do not use the sign of charge in this equation

If Q Is negative the electric field points directly toward Q, if Q is positive the electric field points points directly away from Q

Question 13

What is the equation for electrostatic force

Answer 13

mv^2/r=kq1q2/r^2