electrostatics

Fields and Forces

100

What is Coulombs law?

Coulomb's law states that the magnitude of the electrostatic force between two point charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.

200

Electrostatic Force and Charge are ___________ proportional.

directly

300

What are the units for electric field? 

N/C or V/m

400

What is Newton's Law of Universal Gravitation?

ALL objects attract each other with a force of gravitational attraction

500

Both electric field, and electrostatic force have an inverse square relationship with what? 

Distance between center of objects

Vocabulary

100

Define conduction

object or type of material that allows the flow of an electrical current in one or more directions.

200

Define electrostatics.

the study of stationary electric charges or fields as opposed to electric currents.

300

Define electrical forces.

attractive or repulsive force between two charged objects.

400

Define conservation of Charge

a principle stating that the total electric charge of an isolated system is fixed

500

define electrically polarization

when an electric field distorts the negative cloud of electrons around positive atomic nuclei in a direction opposite of the fields

Formulas

100

What is F_e?

electrical force

200

ef constant

9x10^9 N(m^2/c^2)

300

Potential Difference equation 

V=W/q

400

proton

+ 1.6x10^-19 C

500

Electrostatic Force

F=k(q1q2/r^2)

General Electrostatics

100

What is the electric force?

Charge is a fundamental property that makes charged particles feel this

200

What is the product of the charges?

The magnitude of the electric force is proportional to this.

300

What are field lines?

Point in the direction that a positive test charge would accelerate if placed upon the line

400

Test charge

charge with a magnitude so small that placing it at a point has a negligible affect on the field around the point

500

what forces are repulsed?

positive(+)

Problem Solving

100

A balloon with a charge of 4.0x10^-5C is held a distance of .10M from a second balloon having the same charge. Calculate the magnitude of the repulsive force.

F=((9x10^9)(4x10^-5)(4x10^-5))/(.1m)^2=1440N

200

A +5.0uC charge and a -6.0uC charge experienced an attractive force of -.72N. Determine their separation distance.

r = .61m

300

The force between two identical charges separated by 1 cm is equal to 90 N. What is the magnitude of the two charges

1.00×10^6 C

400

Two neutrally charged bodies are separated by 1 cm. Electrons are removed from one body and placed on the second body until a force of 1×10-6 N is generated between them. How many electrons were transferred between the bodies?

6.59×108 electrons were transferred

500

What is the potential difference when 12J of work is done while moving 60 electrons?

1.25 x 10^18 V