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.
Electric Charge and Electric Field LectureFroyd Wess
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
Electric Charge and Electric Field LectureFroyd Wess
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
The force felt by a unit positive charge or test charge when it's kept near a charge is called Electric Field. The electric field is also defined as the region which attracts or repels a charge. The electric field is a vector quantity and it denoted by E. Copy the link given below and paste it in new browser window to get more information on Electric Field www.askiitians.com/iit-jee-electrostatics/electric-field/
Malaysia SPM syllabus Physics Chapter 7 Part 4: Electromotive force and internal resistance
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This is first PPT in the electrostatics series. This PPT presents idea of charge , its various methods of production like through conduction, friction, induction. It also describes working of electroscope & concept of grounding of an insulator.
The force felt by a unit positive charge or test charge when it's kept near a charge is called Electric Field. The electric field is also defined as the region which attracts or repels a charge. The electric field is a vector quantity and it denoted by E. Copy the link given below and paste it in new browser window to get more information on Electric Field www.askiitians.com/iit-jee-electrostatics/electric-field/
Malaysia SPM syllabus Physics Chapter 7 Part 4: Electromotive force and internal resistance
Also available for hire!
Contact us for your presentation design needs: lesson / teaching, wedding, seminar, workshop, client pitch etc.
This is first PPT in the electrostatics series. This PPT presents idea of charge , its various methods of production like through conduction, friction, induction. It also describes working of electroscope & concept of grounding of an insulator.
COMPARING ELECTROSTATIC AND GRAVITATIONAL FORCES.
Electrostatic forces gravitational force. Electrostatic is the force of attraction or repulsion between two charges at rest while the gravitational force is the force of attraction between two bodies by virtue of their masses. masses.
https://bdslearningapp.blogspot.com/2020/09/electric-charges-and-fields_10.html
Fun with electric charge and coulombs lawDevi Sahu
The fun facts about physics related to coulombs law. This slide is to be viewed after learning the basics of Coulombs law in Cerego. Learn here https://cerego.com/sets/745640
The following presentation explain about electric charge ,its properties and methods of charging a body .the presentation also explain electrostatic force
Describes electrostatic principles and concepts.
**More good stuff available at:
www.wsautter.com
and
http://www.youtube.com/results?search_query=wnsautter&aq=f
Electrostatics is the branch of physics in which we study the charges at rest. In 1784 a French military engineer Charles Coulomb proposed a law known as Coulomb law.
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An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
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2. • In the year 1786, Coulomb deduced the expression for the force
between two stationary point charges in vacuum or free space.
Consider two point charges q1 and q2 at rest in vacuum, and
separated by a distance of r,
3. COULOMB’S LAW
•Coulomb's law states that the electrostatic
force is directly proportional to the product
of the magnitude of the two point charges
and is inversely proportional to the square
of the distance between the two point
charges
4. •According to Coulomb, the force on the point
charge q2 exerted by another point charge q1 is
•Where is the unit vector directed from charge
q1 to charge q2 and k is the proportionality constant
5. • The force on the charge q2 exerted by the charge q1
always lies along the line joining the two charges
is the unit vector pointing from charge
q1 to q2 .
•Likewise, the force on the charge q1 exerted by q2 is
along
6.
7. • The magnitude of the electrostatic force between two
charges each of one coulomb and separated by a distance
of 1 m .
• This is a huge quantity, almost equivalent to the weight of
one million ton.
• Most of the electrical phenomena in day-to-day life involve
electrical charges of the order of µC or nC
8. •In a medium of permittivity ε, the force between two point
charges is given by
•In SI units, Coulomb’s law in vacuum takes the form
•Since ε>εo, the force between two point charges in a
medium other than vacuum is always less than that in
vacuum. We define the relative permittivity for a given
medium as εr = ε/εo, . For vacuum or air, εr = 1 and for
all other media εr> 1.
9. •Coulomb’s law has same structure as
Newton’s law of gravitation.
•Both are inversely proportional to the square
of the distance between the particles.
• The electrostatic force is directly proportional
to the product of the magnitude of two point
charges and gravitational force is directly
proportional to the product of two masses
10. •The gravitational force between two masses is
always attractive but Coulomb force between two
charges can be attractive or repulsive, depending on
the nature of charges
•The value of the gravitational constant G = 6.626 ×
10-11 N m2 kg-2. The value of the constant k in
Coulomb law is k = 9 × 109 N m2 C-2. Since k is much
more greater than G, the electrostatic force is always
greater in magnitude than gravitational force for
smaller size objects
11. • The gravitational force between two
masses is independent of the medium.
• For example, if 1 kg of two masses are kept in
air or inside water, the gravitational force
between two masses remains the same.
• But the electrostatic force between the two
charges depends on nature of the medium in
which the two charges are kept at rest
12. •The gravitational force between two point
masses is the same whether two masses
are at rest or in motion.
• If the charges are in motion, yet another
force (Lorentz force) comes into play in
addition to coulomb force.
13.
14. • The expression for Coulomb force is true only for point
charges.
• But the point charge is an ideal concept.
•However we can apply Coulomb’s law for two charged
objects whose sizes are very much smaller than the
distance between them.
• In fact, Coulomb discovered his law by considering the
charged spheres in the torsion balance as point charges.
•The distance between the two charged spheres is much
greater than the radii of the spheres
15.
16.
17.
18.
19.
20.
21.
22.
23. • If the two spheres are neutral, the angle between them will
be 0o when hanged vertically. Since they are positively
charged spheres, there will be a repulsive force between
them and they will be at equilibrium with each other at an
angle of 7° with the vertical.
• At equilibrium, each charge experiences zero net force in
each direction. We can draw a free body diagram for one of
the charged spheres and apply Newton’s second law for
both vertical and horizontal directions
24.
25.
26.
27.
28.
29.
30.
31. • The electrostatic force between a proton and an electron is
enormously greater than the gravitational force between
them.
• Thus the gravitational force is negligible when compared
with the electrostatic force in many situations such as for
small size objects and in the atomic domain.
• This is the reason why a charged comb attracts an
uncharged piece of paper with greater force even though
the piece of paper is attracted downward by the Earth
33. SUPERPOSITION PRINCIPLE
•The superposition principle explains the interaction
between multiple charges
•According to this superposition principle, the total
force acting on a given charge is equal to the vector
sum of forces exerted on it by all the other charges
34. • Consider a system of n charges, namely q1, q2, q3 ….qn.
The force on q1 exerted by the charge q2
• Here 𝑟12 is the unit vector from q2 to q1 along the line joining
the two charges and r21 is the distance between the charges
q1 and q2. The electrostatic force between two charges is
not affected by the presence of other charges in the
neighbourhood
35. • The total force acting on the charge q1 due to all other charges is
given by
36.
37.
38.
39.
40. • The charges q2 and q4 are equi-distant from q1.
• As a result the strengths (magnitude) of the forcesF12 and
F14 are the same even though their directions are different.
• Therefore the vectors representing these two forces are drawn
with equal lengths.
• But the charge q3 is located farther compared to q2 and q4.
• Since the strength of the electrostatic force decreases as
distance increases, the strength of the force F13 is lesser than that
of forces F12 and F14 .
• Hence the vector representing the force F13 is drawn with smaller
length compared to that for forces F12 and F14 .
41.
42.
43. • From the figure, the angle θ = 45o. In terms of the components, we
have