ELECTRIC FIELD - LESSON 3
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The document defines key concepts relating to electric fields and potential. It defines an electric field as the space around a charge where another charge feels a force, and represents electric fields using field lines showing direction and strength. Electric field strength is defined as the force felt by 1 coulomb of charge, and can be calculated as force over charge. A charge placed in a uniform electric field will experience a force in the direction or opposite the field depending on its sign. The strength of a uniform electric field is calculated as the potential difference across plates over their separation. The radial electric field of a point charge is defined, and its strength calculated using Coulomb's law as force over test charge. Electric potential is defined as the electric potential energy of
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This document provides a summary of Lecture 2 on electrostatics. It introduces fundamental concepts such as electric charge, Coulomb's law, electric field, electric potential, and the relationship between electric field and electric potential. Continuous distributions of charge such as volume, surface, and line charges are also discussed. Key equations for calculating electric fields and potentials from these various charge distributions are presented.
Ch 18 Electric Fields
This document provides learning objectives and content outlines for an AP Physics chapter on electric forces and electric fields. It begins by listing key concepts students should understand related to electrostatics, including charge, Coulomb's law, and the electric field. It then provides an outline of the chapter sections, which cover the origin of electricity, charged objects and the electric force, conductors and insulators, methods of charging, Coulomb's law, the electric field, and other topics. Tables of contents and examples are also included.
Ch10 - potential difference and electric potential energy
Electric potential energy and gravitational potential energy both increase as work is done to overcome a field and raise an object or charge. Voltage measures electric potential energy per unit charge and represents how much energy a charge will gain or lose when moving through a potential difference. It is defined as the change in electric potential energy divided by the charge and can be measured in joules per coulomb (volts).
Potential difference and power.ppt
This document covers potential difference, power, and resistance in electrical circuits. It defines potential difference as another term for voltage and describes how batteries provide potential difference to allow the conversion of electrical energy into other forms like light. It gives examples of electrical energy being converted to energy in a toaster or heat in a wire. It defines power as the rate of doing work, measured in watts, and provides the formulas to calculate power as P=VI, P=I^2R, and P=V^2/R. It describes using data loggers and circuits to measure voltage, current, and calculate power, and how resistance affects current in a circuit. Components that obey Ohm's law are identified.
Electric field intensity
This document summarizes key concepts related to electric fields. It defines electric fields and their relationship to force. It then describes the electric field intensity and field patterns due to various charge distributions including point charges, multiple charges, infinite line charges, and infinite surface charges. It also covers Gauss's law relating electric field and charge distribution.
Electric Charge and Electric Field Lecture
More: http://www.pinoybix.org
Lesson Objectives:
Static Electricity; Electric Charge and Its Conservation
Electric Charge in the Atom
Insulators and Conductors
Induced Charge; the Electroscope
Coulomb’s Law
Solving Problems Involving Coulomb’s Law and Vectors
The Electric Field
Field Lines
Electric Fields and Conductors
Gauss’s Law
Electric Forces in Molecular Biology: DNA Structure and Replication
Photocopy Machines and Computer Printers Use Electrostatics
Electrical Potential
1) Electrical potential energy, also called voltage or potential difference, is a measure of the work required to move a charge in an electric field.
2) Voltage is calculated by dividing the work done (in Joules) by the charge moved (in Coulombs).
3) Stored electrical potential energy can be released as kinetic energy when charges are accelerated by a voltage and moved in an electric field.
Electrostatics
1. Electrostatics involves electric charges at rest, which arise from the particles that make up atoms. Atoms have equal numbers of protons and electrons, giving them a net neutral charge.
2. Objects can become charged through friction, induction, or conduction. Friction charging involves the transfer of electrons between two objects in contact. Induction charging uses a charged object to polarize a neutral object without direct contact.
3. The amount and type of charge on an object depends on whether it has an excess or deficit of electrons compared to protons. Coulomb's law describes the relationship between charged objects based on their relative charges and distance.
Three types of Charges
A positive charge occurs when an object has fewer electrons than protons, giving it an excess of protons. This excess of protons causes a negative charge to accumulate on nearby objects, resulting in an attractive electrostatic force. Positive charges are used to generate electric currents and in applications like spray painting. A negative charge is an excess of electrons, causing the object to attract other positively charged particles. Neutral objects have an equal number of protons and electrons, resulting in no net electric charge.
Electrostatics 1
This document discusses various topics related to electrostatics including frictional electricity, properties of electric charges, Coulomb's law, units of charge, relative permittivity, and continuous charge distribution. It defines frictional electricity as the transfer of electrons from one body to another when two suitable bodies are rubbed together. It also describes Coulomb's law, which states that the electrostatic force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Finally, it discusses different types of continuous charge distributions including linear, surface, and volume charge densities.
LAWS OF ELECTROSTATICS
This document summarizes key concepts in electrostatics including:
1) Electrostatics is the study of properties of electric charges at rest. Charges of the same type repel and opposite charges attract based on Coulomb's law.
2) Coulomb's law states that the electrical force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
3) Electric field is defined as the force experienced by a unit positive charge placed at a point in an electric field. Electric field lines represent the direction of the electric field.
Static Electricity
Static electricity occurs when objects become electrically charged through the transfer of electrons. Charging occurs when two materials are rubbed together, causing electrons to move from one material to the other. This leaves one material with an excess of electrons and a negative charge, and the other material with a deficit of electrons and a positive charge. The electric charges remain on the surface of the objects until they are given a path to ground or neutralize each other through contact or discharge.
Electrostatics
Describes electrostatic principles and concepts.
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2. The electric field due to a point charge is directed away from a positive charge and toward a negative charge.
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The document describes concepts from a lecture on electric fields, including:
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ELECTRIC FIELD - LESSON 3
- 2. Continous assessment 1.Define an electric field. It is the space around a charge where another charge feels a force. 2.How do you represent an electric field? By electric field lines. The direction of the arrows shows the direction of the field.The spacing between the lines tells us about the strength of the field.
- 3. 3.Define electric field strength (E) . • It is the force felt by 1coulomb of positive charge. • Electric field strength( E ) = Force F)/Charge(Q) E=F/Q or F= QE • Unit is Newton/Coulomb (N/C) or Volt/metre (V/m) • E is a vector
- 4. Force experienced by a charge in an electric field Consider a uniform field of strength E. F= -QE --Q +Q E F=QE If you place a charge +Q in the field ,it will experience a force F=QE in the direction of the field. If you place a charge -Q in the field ,it will experience a force F= - QE in the opposite direction of the field.
- 5. Electric field strength of a uniform electric field Electric Field strength(E)=Potential difference across the plates(V)/seperation between the plates E=V/d ; unit = V/m + + + + - - - - d V E
- 6. Electric field strength of radial Electric field Q +q r F A point charge +Q produces a radial field. A small positive test charge is placed in the field. Using Coulomb’s law the force on the test charge +q is given by F=k Qq/r² El. Field strength is force per unit charge E=F/q = k Qq/r²q E = k Q/r²
- 8. Electric potential • Electric potential at a point is the electric potential energy of a unit positive charge placed at that point • Unit : Joule/ coulomb or volt