The Rules
What a CHARGE!
Coulomb's Law
Electric Fields
Misc
100
These are the two fundamental rules at the base of all electrical phenomena.
What is opposite charges attract and like charges repel?
100

Two balloons are hung from the ceiling by threads. Balloon A is positively-charged. Balloons A and B repel each other. Balloon B is ________.

Positively charged 

100

9 x 10^9 Nm^2/C^2 is what variable in the equation?

k 

100

Electric field vectors point in what direction?

Towards negative charges, away from positive charges 

100

Name all subatomic particles and where they exist in the atom 

protons and neutrons exist in the nucleus, electrons exist in a cloud outside the nucleus 

200

Objects that have as many protons as electrons are called what?

Neutral objects

200

Three balloons are hung from the ceiling by threads. Balloon A is negatively-charged. Balloons A and B attract each other. Balloons B and C attract each other. Balloon C attracts neutral paper bits. Balloon C is ________.

 

+ or negative 

200

What does d stand for in the coulomb's law equation? 

distance between two objects 

200

What is the equation for electric field if given the charge on a test charge (q)

E field = Force / q 

200

If a negatively charged object comes near a neutral object and polarizes it, what charge will be nearest the object? 

+ 

300

The only charge that can be transferred between materials 

What are electrons?

300

Neutral objects can often be attracted to charge objects through this interaction 

Polarization 

300
Coulomb's Law is very similar in form to this law.
What is Newton's Law of Universal Gravitation?
300

What value do you need to find the electric field given the charge on the point charge that creates the electric field? 

distance 

300

A neutral object can become positively-charged during an electrostatic phenomenon by 


losing electrons 

400
An object is said to be charged if it lost or gained these particles.
What are electrons?
400

Object A is negatively charged. Object A and Object B repel. Object B and Object C repel. Object C and Object D attract. Object D and Object E attract. Object E and Object F repel. What type of charge does Object B, Object C, Object D, Object E, and Object F possess?
 

B = - 

C = - 

D = + or N 

E = - or + 

F= - or + 

400

What does coulomb's law measure? 

force between two charges 

400

Name one rule when drawing electric field lines?

Must be symmetrical, pointing towards negative charges, don't intersect 
400
The electrical force between two objects is 36 N. If the charge on both of the objects is tripled and the distance is doubled, the force between them will be 

81 N

500

The two factors that affect the force between two electric charges.

What are the amount of charge and the distance between them?

500

Often people can discharge wires and or objects by doing what?

Grounding (touching an insulating object) 

500

Two ping pong balls have been painted with metallic paint and charged. The charge on the balls are -3.92x10-7 C and -4.64x10-7 C. Determine the force of electrical repulsion when held a distance of 64.1 cm apart.


0.00398 N 

500
In a field diagram, the strength of the electric field is given by this.
What is the density of the field lines?
500

If an electric field is originally 8 x 105 N/C and charge (Q) is doubled, what is the new electrical field strength? 

1.6 x 106 N/C

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