Coulomb's Law
All electricity
Conductors/Insulators
Random Physics
Electric Charge
100
The strength of the electric force depends on what two things?
Magnitude of charge and distance between electric charges
100
What is the units of an electric field?
Newtons/Coulombs
100
Name 2 examples of a conductor
Silver
Gold
Copper
Steel
Sea Water
Metals generally
100
What is the equation for the force of rotational motion?
F=mv^2/r
100
Like charges _____, opposite charges ______
attract, repel
200
Name the 4 fundamental forces
1. weak force
2. strong force
3. electromagnetic force
4. gravitational force
200
What is the electric flux if the field lines are parallel to the surface?
0 -> angle is 90, so cos(90)=0
200
Name 2 examples of an insulator
rubber
glass
oil
diamond
dry wood
200
Who discovered the 3 laws of motion?
Newton
200
What is the basic unit of charge? (A number)
1.6 x 10^-25 C
300
If the charges of two particles double and the distance stays the same, what happens to the force?
Multiplies by 4
300
Electricity is caused by...
The movement of electrons
300
A balloon is rubbed on a cloth and all the positive charges move to one side of the balloon and all the negative to the other side. Is the balloon a conductor or insulator?
Conductor -> allows for the free movement of electrons
300
What are the objects that make up electrons and protons and neutrons?
Quarks!
300
What are the two principles of electric charge?
1. Charge is always conserved
2. Charge is always a multiple of the basic unit of electric charge
400
A charge of 2 X 10-7 C is acted upon by a force of 0.1N. Determine the distance to the other charge of 4.5 X 10-7 C.
Distance = 0.09 m
400
What is the electric field inside a conductor?
E=0
400
What is it called when an object is very conductive?
Superconductor!
400
Ultraviolet light has a wavelength of about 6 × 10-8 m. What is the frequency of this light? (remember the speed of light is 3*10^8 m/s)
A. 5 × 1015 Hz
B. 0.5 Hz
C. 2 Hz
D. 20 Hz
A
400
Which of the following best represents the lines of electric potential surrounding two identical positively charged spheres?
A. 
B. 
C. 
D. 
B
500
Which has the larger charge (in terms of magnitude, not sign) -- electron or proton?
Both have the same charge, different signs
500
In conductors, electrons can flow because their
- ions are free
- protons are free
- electrons are free
- negative ions are free
3
500
How much stronger is the electromotive force times gravity?
10^36