Electric charge and static electricity fisica
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Electric charge is a property that causes subatomic particles like protons and electrons to attract or repel each other. A net electric charge is produced by an excess or shortage of electrons, and electric forces are the attraction or repulsion between charged objects. Static electricity refers to the transfer of electric charge through friction, contact, or induction, which can cause hair to stand up or sparks to fly.
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Coulombs Law
1. Coulomb's Law describes the electrostatic force between two point electric charges. The force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
2. Charles-Augustin de Coulomb invented the torsion balance to measure very weak forces, including electrostatic forces. He used it to determine Coulomb's constant and establish Coulomb's Law.
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coulombs-law.ppt
Charles-Augustin de Coulomb discovered Coulomb's law, which describes the electrostatic force of attraction and repulsion between electric charges. Coulomb's law states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. All matter contains both positive and negative electric charges, and an object is electrically neutral when it contains equal amounts of both types of charges. Charged objects can attract or repel each other depending on whether their charges are opposite or the same.
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3) Ohm's law states that the current through a conductor is directly proportional to the potential difference across it, provided the physical conditions stay the same. The resistance of a conductor depends on its length, cross-sectional area, and the material it is
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Coulombs Law
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2. Charles-Augustin de Coulomb invented the torsion balance to measure very weak forces, including electrostatic forces. He used it to determine Coulomb's constant and establish Coulomb's Law.
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coulombs-law.ppt
Charles-Augustin de Coulomb discovered Coulomb's law, which describes the electrostatic force of attraction and repulsion between electric charges. Coulomb's law states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. All matter contains both positive and negative electric charges, and an object is electrically neutral when it contains equal amounts of both types of charges. Charged objects can attract or repel each other depending on whether their charges are opposite or the same.
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ELECTROSTATIC INDUCTION
Electrostatic induction occurs when a charged object is brought near an uncharged conductor. This causes the redistribution of the conductor's electrons, leaving some regions positively charged and others negatively charged. If the conductor is grounded, electrons will flow to the ground, leaving it positively charged. When the charged object is removed, the conductor's charges spread uniformly again. Dielectrics, made of polar or nonpolar molecules, can be polarized by an external electric field through the alignment of their molecules' dipole moments, resulting in an internal electric field that opposes the external field. Dielectrics break down if the external field exceeds their dielectric strength.
Coulomb's Law
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2. Charles-Augustin de Coulomb developed this law in the late 18th century using a torsion balance he invented to measure very weak forces.
3. Coulomb's Law led to the concept of electric field, which describes the area around a charged object where other charges will experience a force. The electric field strength is defined by Coulomb's constant divided by the distance from the source charge.
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Coulomb's law describes the electrostatic force of attraction or repulsion between two point charges. It states that the magnitude of the electrostatic force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. The law also specifies that the force is along the line joining the two charges. The superposition principle allows calculating the total electrostatic force on a charge from the vector sum of the individual forces exerted by each of the other charges.
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- Coulomb's law describes the electric force between two point charges. The electric field is defined as the force per unit charge exerted on a test charge. Gauss's law relates the net electric flux through a closed surface to the enclosed charge.
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Static electricity results when electrons are transferred between objects, leaving one object with a net positive charge and the other with a net negative charge. Materials are made of atoms containing protons, neutrons, and electrons. Insulators have few free electrons, while conductors have many, allowing charge to flow more easily. Unlike charges attract due to their opposite polarity, while like charges repel. Electrostatics has applications including photocopiers, spray painting, and electrostatic precipitators that remove particles from emissions.
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This lecture overview covers key concepts in electrostatics including electrical forces and charges, Coulomb's law, conductors and insulators, charging methods, electric fields, electric potential, and energy storage in capacitors. Specifically, it discusses how opposite charges attract and like charges repel, defines conductors as materials with free electrons and insulators as tightly bound electrons, explains how Coulomb's law quantifies the relationship between electric force and charge separation, and describes how capacitors store energy by separating opposite charges on conducting plates.
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The document discusses basic concepts of electricity and electrical circuits. It defines static and current electricity, and explains that circuits require a voltage source, conductor, and load. Circuits can be connected in series or parallel. Ohm's law defines the relationship between voltage, current, and resistance. Power and energy calculations are also covered.
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Electricity can be static or current. Static electricity builds up on the surface of objects and does not flow, while current electricity involves the flow of electrons. There are two types of current - direct current where electrons flow in one direction, and alternating current where electrons change direction periodically. Coulomb's law states that the electrical force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Electric circuits can be either series circuits where components are lined up along one path, or parallel circuits which have multiple branching paths.
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This document provides information about static electricity and electrostatics. It defines key terms like electrostatic, charges, protons, electrons, and ions. It discusses historical figures like Benjamin Franklin and his contributions. It explains how charging occurs through friction, conduction, and induction. Rules of attraction and repulsion between charged objects are covered. The document also discusses lightning, electric fields, and Coulomb's Law.
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Electric charge and static electricity fisica
- 1. Priscila Larrauri & Luci Artigas Electric Charge and Static Electricity
- 2. Electric Charge • Def-A property that causes subatomic particles such as protons and electrons to attract or repel each other. • Electric charges move in a flash through a lightning bolt.
- 3. Electric Charges • Def-A net electric charge is produce by an excess or shortage of electrons . • ( C) Coulombs is the unit of electric charges -Quik Math • Takes 6.24X1018 to produce a coulomb
- 4. Electric Forces • Def-The force of attraction or repulsion between electrically charged objects. • Charges repel, and opposite charges attract.
- 5. Electric Fields • Def-The effect an electric charge has on other charges in the space around it. • The strength of an electric field depends o the amount of charge that produces the field and on the distance from the charge.
- 6. Static Electricity and Charging • Def-The study of the behavior of electric charges, including how charge is transferred between objects. • Charge can be transferred by friction, by contact, and by induction. • Law of conservation charge- The total charge in an isolated system is constant.
- 7. Charging by friction • Ex) Balloon pick up a net charge by rubbing a it on your hair • Electrons move from hair to balloon because atoms in rubber have grater attraction for electrons than atoms in hair. Because your hair loses electrons
- 8. Charging by contact • A Van de Graaff generator has charge the metal sphere. By touching it transfer the charge that make the hair repel each other because like charges repel • She acquires a charge large enough to make her hair stand.
- 9. Charing by intruduction • Def- Transfer of charge with out contact between materials. • If you come with a negative charge t the doorknob it induces charges to move within the metal doorknob.
- 10. Static Discharge • Occurs when a pathway through which charges can move forms suddenly • It will not travel through air but it becomes charge when the gap between the objects is small. • Ex) Lighting storm the air is charge from clouds to earth.
- 11. Topic Main Idea Electric Charge Eelctric Force Electric Field Static Electricity
- 12. • http://www.youtube.com/watch?v=F6v8wm7 _vdQ&feature=plcp • http://www.youtube.com/watch?feature=end screen&NR=1&v=VhWQ-r1LYXY