Static Electricity

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Questions and Answers

Match the terms related to electrostatics with their descriptions:

Coulomb's Law = Quantifies the force between two point charges. Electric Field = The region around a charge where another charge experiences a force. Electric Potential Energy = Energy stored in a system due to electric forces. Electrostatics = Deals with electric charges at rest.

Match the applications of electrostatics with their respective processes:

Photocopiers = Utilize electrostatic attraction to transfer toner onto paper. Electrostatic Painting = Employs charged particles to evenly coat surfaces. Air Purifiers = Remove particles by charging and collecting them on charged plates. Van de Graaff Generator = Accumulates electric charge on a hollow metal globe.

Match the factors affecting electrostatic force with their effects, according to Coulomb's Law:

Increase in Charge Magnitude = Results in a proportional increase in electrostatic force. Increase in Distance = Causes a decrease in electrostatic force, following an inverse square relationship. Dielectric Constant = Modifies the electrostatic force between charges in a medium. Charge Polarity = Determines whether the force is attractive or repulsive.

Match the concepts of electric fields with their properties:

Electric Field Lines = Illustrate the direction and strength of the electric field. Electric Field Strength = Force per unit charge experienced by a test charge in the field. Uniform Electric Field = Field with constant magnitude and direction. Superposition Principle = Total electric field is the vector sum of individual fields. Signup and view all the answers

Match the concepts related to electric potential energy with their formulas or descriptions:

Electric Potential Energy = The energy a charge has due to its location in an electric field. Electric Potential Difference = Work done per unit charge to move a charge between two points. Equipotential Lines = Lines along which the electric potential is constant. Relationship to Electric Field = Related to the negative integral of the electric field over distance. Signup and view all the answers

Match the scenarios with the relevant concepts of electrostatics:

Charging by Induction = Separating charges in a conductor without direct contact. Electric Discharge = Sudden flow of electric charge between two objects with different potentials. Capacitance = Ability of a system to store electric charge. Shielding = Using a conductive barrier to block electric fields. Signup and view all the answers

Match the parameters with their units used in electrostatics:

Electric Charge = Coulomb (C) Electric Field Strength = Newton per Coulomb (N/C) Electric Potential = Volt (V) Electric Potential Energy = Joule (J) Signup and view all the answers

Match the behaviors of charges in conductors and insulators:

Conductors = Allow charges to move freely through them. Insulators = Resist the movement of charge. Charge Distribution in Conductors = Charges reside on the surface. Polarization in Insulators = Slight separation of charge within molecules. Signup and view all the answers

Match the relationships described by Coulomb's Law under varying conditions:

Direct Proportionality = Electrostatic force increases with the product of charges. Inverse Square Law = Electrostatic force decreases with the square of the distance. Effect of Medium = Electrostatic force is reduced by the dielectric constant of the medium. Force Direction = Force is along the line joining two point charges. Signup and view all the answers

Match the effects of electric fields on different types of materials:

Conductors in Electric Fields = Charges redistribute until the electric field inside is zero. Insulators in Electric Fields = Experience polarization, creating induced dipoles. Effect on Free Charges = Experience a force that causes them to accelerate. Shielding Effect = Conductors can shield regions from external electric fields. Signup and view all the answers

Flashcards

Electrostatics

Phenomenon involving stationary electric charges.

Coulomb's Law

Describes the force between two point charges; directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.

Electric Field

The region around an electric charge where another charge experiences a force.

Electric Potential Energy

Energy stored in a system due to electric forces.

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Electrostatic Applications

Copiers, paint sprayers, air filters.

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Study Notes

ไฟฟ้าสถิตเกี่ยวข้องกับประจุไฟฟ้าที่อยู่กับที่
กฎของคูลอมบ์อธิบายแรงระหว่างประจุไฟฟ้าสองจุด; แรงแปรผันตรงกับผลคูณของขนาดประจุและแปรผกผันกับกำลังสองของระยะห่าง
สนามไฟฟ้าคือบริเวณรอบประจุไฟฟ้าที่ประจุอื่นได้รับแรง
พลังงานศักย์ไฟฟ้าเป็นพลังงานที่สะสมในระบบเนื่องจากแรงทางไฟฟ้า
ไฟฟ้าสถิตมีการประยุกต์ใช้หลายด้าน เช่น เครื่องถ่ายเอกสาร เครื่องพ่นสี และเครื่องกรองอากาศ