An electromagnet is created by wrapping wire around a ferromagnetic core like iron. Using a ferromagnetic core greatly increases the magnetic field strength from the coil compared to an air core.
A direct current (DC) motor works using the principles of electromagnetism. The coil experiences a force that causes it to rotate when current is passed through it. A split ring commutator reverses the current direction to keep the coil continuously rotating in one direction. The motor consists of a coil wound around an iron core, brushes contacting the split ring commutator, and a rotor or armature.
This Presentation gives a basic idea about Electromagnetic induction,Faraday's Law ,Lenz's law and the application of Electromagnetic Induction. I included some real life examples of electromagnetic induction also. I hope everyone will like it
This Presentation gives a basic idea about Electromagnetic induction,Faraday's Law ,Lenz's law and the application of Electromagnetic Induction. I included some real life examples of electromagnetic induction also. I hope everyone will like it
Presentation on Electromagnetic Induction.
Physics two presentation of CSE dept. Southeast University.
PPTX slides made by Saleh Ibne Omar.
December 2017.
A Detailed Explanation of Solenoid Forceidescitation
This article explains the manner in which the force
of a solenoid varies with coil diameter, coil length, wire gauge,
supply voltage, packing density, and the number of turns.
Particular attention is given to explaining how force varies
with the number of turns, as the author has found that solenoid
behavior in this regard is often non-intuitive and surprising
for engineers who have only been exposed to basic magnetic
field expressions for coils.
Presentation on Electromagnetic Induction.
Physics two presentation of CSE dept. Southeast University.
PPTX slides made by Saleh Ibne Omar.
December 2017.
A Detailed Explanation of Solenoid Forceidescitation
This article explains the manner in which the force
of a solenoid varies with coil diameter, coil length, wire gauge,
supply voltage, packing density, and the number of turns.
Particular attention is given to explaining how force varies
with the number of turns, as the author has found that solenoid
behavior in this regard is often non-intuitive and surprising
for engineers who have only been exposed to basic magnetic
field expressions for coils.
A Project made for my School in the 10th Grade explaining the differences and working of AC and DC Generators.
Contents:
-Introduction
-Electromagnetic induction
-EMF- Electromotive Force
-Fleming’s Right Hand Rule
-Components of a Generator
*Rotor
*Armature
*Coil
*Stator
*Field electromagnets
*Brushes
-A.C. generators
-Commercial A.C generators
-DC generators
-Principle
-Working
-Differences between AC and DC
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
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.
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.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
A Strategic Approach: GenAI in EducationPeter 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.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Palestine last event orientationfvgnh .pptxRaedMohamed3
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.
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This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
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.
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.
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.
1. Lesson 5
Electromagnets and
the Direct Current (DC) Motor
Nelson Reference Pages: 560, 567-Nelson Reference Pages: 560, 567-
570570
McGraw-Hill Reference Pages:McGraw-Hill Reference Pages:
698, 710 - 711698, 710 - 711
2. AnAn electromagnet is created by wrapping wire aroundis created by wrapping wire around
a ferromagnetic core (such as iron). The wrappeda ferromagnetic core (such as iron). The wrapped
wire is essentially a solenoid, and we can use RHRwire is essentially a solenoid, and we can use RHR
#2 to find the North end – as in the diagram. The#2 to find the North end – as in the diagram. The
ferromagnetic core greatly increases the strength offerromagnetic core greatly increases the strength of
the electromagnet in comparison to an air core.the electromagnet in comparison to an air core.
Why?Why?
Ans. The magnetic field from the coil aligns theThe magnetic field from the coil aligns the
domains in the iron. This increases the number ofdomains in the iron. This increases the number of
field lines inside the coil which is an increase in thefield lines inside the coil which is an increase in the
magnet field strength.magnet field strength.
3. Electromagnetic Design
1. If the current in the coil is doubled, the strength of the
magnetic field will also be doubled.
2. If the number of turns on the coil is doubled, the strength of
the electromagnet will also be doubled.
3. Using a ferromagnetic core material will greatly increase
the strength of the EM. The Nelson 11 (old version)
textbook states that the strength can increase by 1000
times!
Question: What happens if a non-ferromagnetic material is
used for the core?
Ans. Non-ferromagnetic materials can not increase the field
strength as they do not have domains. It has been found
an aluminum core will have no effect and copper actually
causes a decrease in field strength (compared to an air
core).
4. The Motor Principle
The coil, in the diagram,
experiences a force
which causes a CW
rotation. The direction
is found by using RHR
#____ .
Now, consider what
happens when the coil
turns 900
CW. If the
current direction does
not change, the top of
the coil would
experience an ___ward
force and the bottom of
the coil would
experience a ___ ward
force. This would
cause the rotation to
_______ .
I
I
+-
U p
5. All direct current (DC) motors have aAll direct current (DC) motors have a split ring commutator
which allows the current to reverse direction. This in turnwhich allows the current to reverse direction. This in turn
causes the direction of the force on the edges of the coil tocauses the direction of the force on the edges of the coil to
also _______ . In doing so, the coil will continuouslyalso _______ . In doing so, the coil will continuously
_______ . The_______ . The diagrams above show the typical setup of ashow the typical setup of a
small dc motor. The parts of the motor are listed in thesmall dc motor. The parts of the motor are listed in the
second diagram:second diagram: brushes, split ring commutator, rotor (or
armature), windings (wrapped on an iron core), stator.
6. Practice Questions
(Note: Use CW for clockwise and CCW for counter
CW when describing observed rotations of a coil
or motor armature)
Electromagnet
Workbook
Page 67 (old 61b) #1–5 (right side)Page 67 (old 61b) #1–5 (right side)
DC Motor
Nelson Textbook
Page 571 #1, 2Page 571 #1, 2
Page 584 # 10Page 584 # 10
