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

We are usually not aware of the electric force acting between two everyday objects because

Most everyday objects have as many plus charges as minus charges (neutral!)

100

See diagram on PPT for question:

This is the direction (cardinal) of the net electric field at point P.

What is NorthEast?

100
9 x 10^9 Nm^2/C^2
What is k?
100

Two identical positive charges are placed near each other. Describe the electric field and electric potential at the point halfway between the two charges.

What is zero and positive respectfully?

200
Objects that have as many protons as electrons.
What are neutral objects?
200
The process in which there must be a touch or a spark from the object doing the charging to the object being charged.
What is charge by conduction?
200

Q2 is located in between two charges. Q1 is located 10 m to the left of Q2 while Q3 is located 20 m to the right of Q2. 

Q2 has a charge of 4 mC, Q1 has a charge of -1 mC, and Q3 has a charge of 2 mC. 

Find the magnitude and direction of the net force on Q2.

What is 540 N to the left?

200
Of the three types of particles that make up an atom, this one does NOT feel the electric force.
What is the neutron?
200

The diagram shows two charges q1 = 2nC and q2 = 4 nC. The distance between q2 and q1 is 1 meters and the distance between q2 and P is 2 meters. q2 is located in between q1 and P. This is the electric potential at Point P.

What is 24 V?

300
The only charge that can move in a solid material.
What are electrons?
300
The process by which the object responsible for electrifying does not transfer any charge to the object being electrified.
What is charge by induction?
300

A person scuffing her feet on a wool rug on a dry day accumulates a net charge of 83 uC. This is the number of electrons she receives.

What is 5.2 x 1014 electrons?

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

See diagram on PPT to answer. 

The left cylinder is charged positvely. This is the sign of the other cylinder.

What is positive?

400
The two factors that affect the force between two electric charges.
What are the amount of charge and the distance between them?
400
This happens in the molecules of dust to explain why dust so readily sticks to television tubes. It also happens to your electroscope in the presence of a charged object.
What is charge polarization?
400

Point P is located between three charges. Q1 (-8 uC) is located 20 m to the left of Point P, Q2 (1 uC) is located 10 m to the left of Point P and Q3 (2 uC) is located 10 m to the right of Point P. Find the electric field at point P (magnitude and direction). 

What is 270 N/C to the left?

400
Although atoms are usually neutral, an atom in this form will feel the electric force.
What is an ion?
400

See diagram on PPT for question.

This is the potential difference, Va - Vb, between points A and B.

What is -10V?

500
An object is said to be charged if it lost or gained these particles.
What are electrons?
500

A region around a charged particle where a force could be applied.

What is electric field?

500

Two small spheres have equal charges q and are separated by a distance d. The force exerted on each sphere by the other has magnitude F. If the charge on each sphere is doubled and d is halved, the force on each sphere has this magnitude.

What is 8F?

500

This is Coulomb's Law. State as words.

What is the force of attraction between two charges?

500

See diagram on PPT for question.

This is the amount of work done by the field if a charge of 0.5 coulomb is moved along a path from point A to point E and then to point D.

What is -15 J?

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