Electric Force and Field
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1) The document discusses electric force and field, explaining that an electric field exists in the space surrounding charged objects and is a property of those charged sources. 2) It provides examples of the magnitude of electric fields in different situations, from household circuits to inside atoms. 3) The electric field due to a point charge is illustrated as radiating uniformly outward or inward from the charge, depending on its sign.
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This presentation is about electric potential. As we know, electric fields are vector quantities, which define electric field properties. The electric properties of space can also be described by electric potential. Electric potential is scaler. The concept of electric potential is more important due to its advantages over electric field as it has no direction which make it simpler. Electric potential is more practical than the electric field because differences in potential. Electric potentials and electric fields are associated with each other, and either can be used to describe the electrostatic properties of space. The gravitational potential energy is meaningful only in terms of the difference in potential energy in respect of reference point. The most important fact is that the Electric potential have similar characteristics as that of gravitational potential energy.
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Okay, let's break this down step-by-step:
1) The electric field E is uniform, so E has a constant magnitude and direction.
2) The path icf consists of two segments: ic and cf.
3) For ic, the displacement is at a 90° angle to E so no work is done along that segment.
4) For cf, the displacement forms a 45° angle with E.
So the key is to integrate E×ds along just the cf segment.
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E&M Lecture 2.pptx 2nd semester lecture UET mardan
UpdatedElectric_Magneeeeeetic_Fields.ppt
The document discusses electric and magnetic fields. It defines electric field lines and how they point away from positive charges and toward negative charges. It provides the equation for calculating electric field strength from a point charge and the equation for calculating electric force from an electric field. It also discusses magnetic fields, including how current-carrying wires create magnetic fields and how charged particles experience a force in a magnetic field. Sample problems demonstrate using the right-hand rules to determine direction of magnetic forces.
electric charge and electric field
The document discusses concepts related to electric charge, electric fields, and electric circuits. Some key points covered include:
- Charged objects exert forces on each other via an electric field according to Coulomb's law. The electric field is defined as the force per unit charge.
- Conductors allow free flow of electric charge while insulators do not. Resistors in circuits control current flow according to Ohm's law.
- Electric potential energy and voltage difference can be defined from the work done in electric fields. Equipotential surfaces exist where electric potential is constant.
- Electric current is the rate of flow of electric charge through a cross-sectional area of a conductor. Current, voltage, and resistance
Electrical Fields
The document discusses various topics relating to electrical fields including:
- The definition of electric field strength and its relationship to charge and distance.
- Electric field lines and the rules for drawing them, including that they originate from positive charges and terminate at negative charges.
- How electric field strength decreases with distance from a charged object.
- Examples of electric field drawings and practice problems identifying correct and incorrect field patterns.
- The relationship between number/closeness of field lines and magnitude of electric charge.
- Applying the principle of superposition to find the net electric force on charges from multiple sources.
- The concept of electrostatic equilibrium for conductors.
Unit 2 Electrostatics
This document provides an overview of electrostatics. It defines key concepts like electric field, electric flux density, Gauss's law, capacitance, and more. Applications of electrostatics include electric power transmission, X-ray machines, solid-state electronics, medical devices, industrial processes, and agriculture. Coulomb's law describes the electric force between point charges. Gauss's law relates the electric flux through a closed surface to the enclosed charge. Capacitance is the ratio of stored charge on conductors to the potential difference between them.
Electricfields
1. The document discusses electric fields, including field vectors, field strengths for point charges and uniform fields, and fields around various charge configurations.
2. It reviews gravitational fields and compares them to electric fields. Both fields are defined by the force per unit charge or mass exerted on a test particle.
3. Examples are given of calculating field strengths and drawing electric field lines for single and multiple point charges of the same and opposite signs.
Electrostatics in vacuum
This document discusses electrostatics in vacuum. It begins by defining electrostatics and Coulomb's law, which states that the electrostatic force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. The document then discusses electric field, electric flux, Gauss' law, and applications of Gauss' law to calculate electric fields for an infinite sheet of charge, infinite line of charge, and uniformly charged sphere.
Dtdm theory book soft copy 2
This document provides an overview of electrostatics and electric current concepts. It defines electrostatics as electricity from the Greek word for amber, where static electricity is generated by rubbing materials together. The key concepts covered include:
- Coulomb's law which describes the force between electric charges.
- The properties of electric fields and field intensity.
- How capacitors store electric charge and the differences between capacitors connected in parallel versus series.
- Definitions of electric current, resistance, voltage, and potential drop in circuits.
Electric Field.pptx
An electric field exists in the space around a charged object. It is defined as the electric force per unit charge. The electric field depends on the charge creating it and the distance from that charge. Electric field lines indicate the direction of the electric field, extending away from positive charges and toward negative charges. The total electric field is the vector sum of the fields from individual charges through superposition.
Electric field dd.pptsss
The document discusses electric field lines and their properties. It provides examples of electric field line patterns for single and multiple point charges. Key points covered include:
- Electric field lines extend radially outward from a positive point charge and inward toward a negative point charge.
- For two charges of the same sign, field lines point from one charge to the other with no lines between. For opposite charges, field lines begin on the positive and end on the negative charge.
- The number of field lines is proportional to charge magnitude. Stronger fields have more closely spaced lines.
- Field lines always meet conductors perpendicularly and the field is zero inside a charged conductor.
Physics121 lecture05
The document summarizes key concepts from a physics lecture on electric potential including:
1. The electric potential (V) at a point is defined as the work (W) done per unit charge to move a test charge from a reference point to that point.
2. Equipotential surfaces connect all points of equal electric potential. Electric field lines are always perpendicular to equipotential surfaces.
3. Expressions are derived for the electric potential due to point charges, lines of charge, and continuous charge distributions using integration.
physics121_lecture05.ppt
The document summarizes key concepts from a physics lecture on electric potential including:
1. The electric potential (V) at a point is defined as the work (W) done per unit charge to move a test charge from infinity to that point.
2. Equipotential surfaces connect all points of equal electric potential. Electric field lines are always perpendicular to equipotential surfaces.
3. Expressions are derived for the electric potential due to point charges, lines of charge, and continuous charge distributions using integration.
physics121_lecture05.ppt
The document summarizes key concepts from a physics lecture on electric potential including:
1. The electric potential (V) at a point is defined as the work (W) done per unit charge to move a test charge from infinity to that point without acceleration.
2. Equipotential surfaces connect all points of equal electric potential. Electric field lines are always perpendicular to equipotential surfaces.
3. Expressions are derived for the electric potential due to point charges, lines of charge, surfaces of charge, and volumes of charge using integration.
physics121_lecture05.pptttttttttttttttttttttt
The document summarizes key concepts from a physics lecture on electric potential including:
1. The electric potential (V) at a point is defined as the work (W) done per unit charge to move a test charge from infinity to that point.
2. Equipotential surfaces connect all points of equal electric potential. Electric field lines are always perpendicular to equipotential surfaces.
3. Expressions are derived for the electric potential due to point charges, lines of charge, and continuous charge distributions using integration.
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E&M Lecture 2.pptx 2nd semester lecture UET mardan
E&M Lecture 2.pptx 2nd semester lecture UET mardan
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Chapter2
Rational numbers include fractions and repeating decimals. They can be added, subtracted, multiplied, and divided using simple rules. To add or subtract rational numbers, find a common denominator and then combine the numerators, and to multiply or divide rational numbers, perform the indicated operation on the numerators and denominators separately.
Symbols and expressions
Symbols and expressions are used in mathematics and logic to represent concepts, objects, quantities or relations. Symbols allow complex ideas and relationships to be more concisely expressed and manipulated according to specific rules. Mathematical expressions use symbols, numbers and logical connectives according to a defined syntax in order to represent mathematical ideas, relationships between quantities or logical propositions.
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The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness, happiness and focus.
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The document discusses adding integers using a number line. It provides examples of adding positive and negative integers by counting right on the number line for positive numbers and left for negative numbers. The number line is used to illustrate the process of adding integers and finding the sum.
Sequences and series
The document contains information about arithmetic and geometric sequences. It defines an arithmetic sequence as one where each term is found by adding the same number to the previous term, called the common difference. A geometric sequence is one where each term is found by multiplying the previous term by the same number, called the common ratio. Examples are worked through and questions are asked about finding the next term in various sequences.
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The document discusses the distributive property and how it is used to simplify algebraic expressions. It provides examples of distributing terms over addition and subtraction. It defines terms, coefficients, and like terms. It then gives examples of simplifying expressions by combining like terms.
11 e1ws4
1. The document discusses electric fields, including that the electric field is the amount of electric force per Coulomb of charge. Electric field lines show the magnitude and direction of the electric force on a charged particle. Field lines start on positive charges and end on negative charges, and the electric force is always tangent to field lines.
2. It provides examples of calculating electric force using the electric field intensity and charge amount. Electric field diagrams show the direction of the electric force on sample charged particles. The direction of the force can be determined from the field lines.
3. Key concepts are explained, including that if all electric field lines point into a hidden charged region, the region must contain a positive charge, and examples
Electric force and field problem set
The document outlines 7 problems related to electric force and fields. The problems involve: 1) explaining the attraction between a charged rod and neutral paper, 2) comparing Coulomb's and Newton's laws of gravitation, 3) explaining why test charges used to measure electric fields must be small, 4) drawing electric field lines between two negative charges, 5) explaining why electric field lines can't cross, 6) calculating the net force on positive charges at the corners of an equilateral triangle, and 7) calculating the electric field at a corner of a square with differing corner charges.
Electric field solving
1) The document calculates the electric field components Ex and Ey resulting from two point charges q1 = 10 nc and q2 = 15 nc located at distances of 3m and 5m respectively.
2) It finds that Ey = 14.6 N/C and Ex = -4.8 N/C, with the total electric field making an angle of -72.8 degrees.
3) It notes that when a point charge is placed in a uniform electric field, it will accelerate according to Newton's law, undergoing parabolic motion similar to projectile motion under gravity.
Completing the square (added and revised)
The document discusses solving quadratic equations by completing the square. It provides examples of perfect square trinomials and explains the steps to solve quadratic equations using completing the square. These steps include: 1) moving terms to one side of the equation, 2) finding the term to complete the square and adding it to both sides, 3) factoring the perfect square trinomial, 4) taking the square root of both sides, and 5) solving for the two possible solutions. It also provides a second example where the quadratic coefficient is not 1, requiring dividing all terms by this coefficient first before completing the square.
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Electric Force and Field
- 7. 2. Which diagram could be considered to show the correct electric force on a positive test charge due to a point charge? September 18, 2007 A. B. C. D. E.
- 9. Electric Field due to a group of individual charge September 18, 2007