Charge Chart Organizer Charge Chart Organizer
Name: __________________________
Date: ___________________________
Define each term, sketch a visual representation, and provide a real-world example or non-example.
Ion #001
Definition
Visual Sketch
Real-World Link
Triboelectric Effect #002
Definition
Visual Sketch
Real-World Link
Coulomb's Law #003
Definition
Visual Sketch
Real-World Link
Insulator #004
Definition
Visual Sketch
Real-World Link
Conductor #005
Definition
Visual Sketch
Real-World Link
Electric Field #006
Definition
Visual Sketch
Real-World Link
Shocking Forces Slides Physics Unit 4
Shocking Forces
Static Electricity & Coulomb's Law
Atomic Foundation
Protons (+)
Locked in the nucleus. They determine the identity of the element.
Electrons (-)
Transfers of electrons between atoms create electric charge.
⚛️
Net Charge = 0
Protons = Electrons
Charging by Friction
The Triboelectric Effect
"Contact and separation between materials causes electron transfer based on their affinity."
Human Hair
Loses Electrons (+)
Balloon
Gains Electrons (-)
Barriers & Bridges
Insulators
Electrons stay put.
Rubber
Glass
Conductors
Electrons flow freely.
Copper
Gold
Coulomb's Law
Fe = k · (q1q2) / r2
Fe
Force (N)
k
9.0 × 109 N·m2/C2
q
Charge (C)
r
Distance (m)
Inverse Square
Force is inversely proportional to distance squared.
2x Distance → 1/4 Force
0.5x Distance → 4x Force
r 2r 4r 5r
Electric Force Intensity
Electric Fields
"The invisible region where other charges experience a force."
Points AWAY from (+)
Points TOWARD (-)
Spark Scripts Notes Spark Scripts Notes
Unit 4: Electrostatics & Forces
Name:
Date:
01
Atomic Foundations
Atoms contain protons (+) and electrons (-). An atom is considered _________________________________ when the number of protons equals the number of electrons.
Charge is created by moving ________________________. Protons do not move because they are bound in the ________________________.
02
Charging by Friction
The Triboelectric Effect is charging by ________________________________.
Conductors
Electrons flow _______________________________.
Ex: Copper, Gold, Iron
Insulators
Electrons __________________________________ flow.
Ex: Plastic, Glass, Rubber
03
Coulomb's Law
Fe = k · (q1q2) / r2
Electric Force Formula
k = 9.0 × 109
F = Force (N)
q = Charge (C)
r = Distance (m)
Direct Relationship
If one charge triples, the force will __________________________.
Inverse Square
If distance doubles, the force will __________________________.
04
Electric Fields
Field lines point __________________________ from (+) and __________________________ towards (-) charges.
Sketch: Positive Point Charge Field
Sketch: Electric Dipole (Pair)
Static Snap Lab Laboratory Protocol
Static Snap Lab
⚡
High Voltage
Mission Objective
Observe electrostatic forces and determine charge transfer through friction using the Triboelectric Series.
Triboelectric Series
( + ) Pos. Affinity
Human Hair / Skin
Wool Swatch
Silk Fabric
Rubber (Balloon)
( - ) Neg. Affinity
Operation Procedure
01. Charging
Rub Balloon A with Wool and Balloon B with Hair for 30s.
02. Interaction
Suspend A. Move B closer. Record force direction.
03. Swap
Repeat using Silk on Balloon B for Trial 02.
Observation Log
Trial Combination Result Force Qualitative Notes 01 Wool vs. Hair Sketch Vector 02 Silk vs. Wool Sketch Vector
Critical Analysis
1. Using the series chart: Which material became NEGATIVE in Trial 01? Why did electrons flow that way?
2. Describe the relationship between distance and force. How does this link to Coulomb's Law?
Reference: SPARK-44-B Unit 4 Laboratory Portfolio
Coulomb Combat Worksheet Coulomb Combat
Electrostatic Intelligence Set
Name: ____________________
Unit 4 Practice
Level 01: Recruits
1. An object has 1.5 x 10^18 excess electrons. Find net charge in C. (e = 1.6 x 10^-19 C)
2. If charge triples and distance doubles, by what factor does the force change?
3. A attracts B. B repels positive C. What is the charge of A?
4. Why is neutral paper attracted to a negatively charged balloon?
Level 02: Field Command
5. Calculate force between +8.0 uC and -4.0 uC separated by 0.50 m. (k = 9.0 x 10^9)
Calculation Space
6. Force is 120 N. If distance is reduced to 1/3 original, find new force.
Level 03: The Gauntlet
7. Identical spheres A (+6 uC) and B (-2 uC) are 10 cm apart. They touch and return. What is the final force?
8. Charge Q1 = +4.0 uC is at x = 0. Charge Q2 = +1.0 uC is at x = 1.0 m. Where is net force zero?
F = (k · q1 · q2) / r^2 k = 9.0 x 10^9 e = 1.6 x 10^-19 C
Spark Check Exit Ticket Spark Check
Exit Ticket
Physics Unit 4: Electrostatics
1
When a glass rod is rubbed with silk, it becomes positive. What happened to the electrons?
Electrons moved from rod to silk.
Protons moved from silk to rod.
2
Two charges are 10 cm apart. If distance doubles to 20 cm, the force becomes:
2x stronger
4x stronger
1/2 strength
1/4 strength
3
What is the value of the electrostatic constant k in scientific notation?
4
Two positive charges are placed near each other. Draw the force vectors on both charges.
Draw Vectors Here
5
Sketch the electric field lines for a single negative point charge:
Field Sketch Area
!
Self-Reflection
What is the one concept from today's lesson that is still "fuzzy" or confusing to you?
