Physics Electric Field Lecture Overview

Course Information

• Course Title: Electricity and Magnetism (PHY211)
• Fall Semester 2024
• Offered by the Department of Basic Science
• Instructor: Prof. Mahmoud Sayed Abd El-sadek
• Email: [email protected]
• Course Credits: 3

Lecture Strategy

• Interactive learning methods used in lectures and labs.
• Students will prepare for lectures, participate in discussions.
• Students will be involved in finding information from references.
• Quizzes, assignments, presentations are included.
• Flipped classroom method used in some lectures

General Rules for Lectures

• Lecture duration: 2 hours
• Break after the first hour
• Second half will be a combination of lecture and activity.
• No cell phones during lectures; be quiet.

Course Grading

• Assessment not 100% exam-based.
• Grade distribution includes:
  • Participation Quizzes and Assignments: 20%
  • Midterm Exam: 10%
  • Lab Book Reports: 15%
  • Practical Exam: 15%
  • Final Exam: 40%
• Overall weighting:100%
• Coursework includes attending lectures, presentations, projects and assignments and quizzes.

Course Topics

• Chapter 1: Coulomb's Law
• Chapter 2: Potential difference
• Chapter 3: Ohm's Law
• Chapter 4: Work and Energy
• Chapter 5: Kirchhoff's law
• Chapter 6: Magnetism
• Chapter 7: Faraday's law
• Chapter 8: Wave motion
• Chapter 9: Geometrical optics
• Chapter 10: Optical Instruments

Chapter 1: Electric Charge and Coulomb's Law

• Lecture Layout Includes:
  • Electric charges:
  • Conductors and Insulators
  • Charging
  • Activities

1 - Electric Charge

• Charge (q or Q) is measurable. Unit: Coulomb (C)
• Charge is quantized (comes in units of 1.6 x 10⁻¹⁹ C).
• Elementary particles in atoms include:
  • Protons: +e = +1.6 x 10⁻¹⁹ C
  • Neutrons: Uncharged
  • Electrons: -e = -1.6 x 10⁻¹⁹ C
• Neutral bodies have equal positive and negative charge.
• Charged bodies exert force on each other.
  • Like charges repel.
  • Opposite charges attract.

2 - Insulators and Conductors

• Electrical Conductors: materials that have free electrons that move through the material.
• When a conductor is charged in a small area, it distributes over the entire material surface.
  • Example: Copper is a conductor.
• Electrical Insulators: materials with no free electrons, electrons are bound to atoms.
  • Example: Plastic is an insulator.
• Semi Conductors: materials with properties between conductors and insulators; resistivity increases with decreasing temperature.
  • Examples: Silicon and Germanium.

3 - Charging

• Charging by conduction: Direct contact between charged and neutral objects. Charged object shares charge with the uncharged object.
• Charging by induction: No contact required. Charged object induces charge on another object.

4 - Activities

• Questions are posed about physical phenomena and concepts involving charge and electricity.
• A charged rod attracts dry cork dust but bounces away after touching it.
• Ways to discharge a charged insulator are mentioned.
• The reason why a coin does not become charged by friction.

Next Lecture

• Topics are noted for the following lecture:
  • Coulomb's Law
  • Electric Field
  • Electric Field Lines