Electricity and Magnetism PHY211 Overview

Course Information

• Course name: Electricity and Magnetism (PHY211)
• Course offered by: Basic Science
• Fall 2024 semester
• 3 credit hours

Learning Strategy

• Interactive learning approach
• Student preparation for lectures and open discussions
• Completion of quizzes, assignments, and presentations
• Flipped classroom method for some lectures

General Rules

• Lectures are 2 hours long
• Break after the first hour
• Second half of lecture is divided in half: lecture and activity
• No cell phones during lectures

Grading

• Assessment is not entirely based on exams.
• Participation Quizzes and Assignments: 20%
• Midterm Exam: 10%
• Lab Book Reports: 15%
• Practical Exam: 15%
• Final Exam: 40%
• Total points: 100%

Course Content (Chapters)

• 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:

  • Electric charges
  • Conductors and Insulators
  • Charging
  • Activity

• Electric Charge:

  • Measurable quantity of matter, with symbols q or Q, units are in Coulombs (C).
  • Quantized; comes in units of e = 1.6 x 10^-19 C
  • Elementary particles within atoms
    • Protons: +e = +1.6 x 10^-19 C
    • Neutrons: Uncharged
    • Electrons: -e = -1.6x 10^-19 C
  • Neutral bodies: equal amounts of positive and negative charges
  • Charged bodies: unequal amounts, more of one type
  • Like charges repel, unlike charges attract

• Charging by Friction

  • Rubbing transfers electrons between objects
  • Example: Glass rod-silk, plastic rod-fur

Chapter 2: Insulators and Conductors

• Electrical Conductors: Materials with free electrons (electrons can move freely).
  • When charged, charge distributes across the entire surface
  • Example: Copper
• Electrical Insulators: Materials where all electrons are tightly bound to atoms (electrons cannot move freely).
  • Charge stays localized when charged
  • Example: Plastic
• Semi-conductors: Materials with electrical properties between conductors and insulators.
  • Resistivity increases with decreasing temperature
  • Affected by impurities and junctions and has variable resistance, sensitive to heat and light (current flows more easily in one direction).
  • Example: Silicon, Germanium

Chapter 3; Charging (methods)

• Charging by Conduction: Sharing charge by direct contact between charged and neutral objects.
• Charging by Induction: Charged object influences another object without contact. This creates a charge separation but doesnt necessarily transfer any charge. Often this involves a grounded conductor

Activity

• A charged rod attracts bits of dry cork dust that jump away after touching.
• A charged insulator can be discharged by passing it near a flame (heat dislodges electrons).
• Why a coin rubbed between fingers doesn't become charged.

Next Lecture Topics

• Coulomb's Law
• Electric Field
• Electric Field Lines

This quiz covers the core content of the Electricity and Magnetism course (PHY211), focusing on foundational concepts such as Coulomb's Law, Ohm's Law, and Magnetism. Students will engage in interactive learning and discussions while applying flipped classroom techniques. Assessments include quizzes, assignments, and exams throughout the semester.