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Important Announcements for PHYS 132: Labs, Homework, and Office Hours

Attention PHYS 132 students! Labs begin this week, so please prepare accordingly. For homework, complete Chapter 25 problems, focusing on electric forces and charges. Remember, office hours are MW from 12:30-1:30 pm, TR from 9-10 am, and F from 10-11 am. Don't forget to check out the Tutorial Learning Center for additional support. Ensure you review the basic postulates on electric charges, forces, fields, and the differences between conductors and insulators as you prepare for class discussions.

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Important Announcements for PHYS 132: Labs, Homework, and Office Hours

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  1. Announcements • Homework for tomorrow… (Ch. 25, Probs. ) • PHYS 132 labs beginTHIS week! • Office hours… MW 12:30-1:30 pm TR 9-10 am F 10-11 am • Tutorial Learning Center (TLC) hours: ??

  2. Chapter 25 Electric Forces & Charges

  3. Chapter 25 Preview… Electrostatics • Electric charges & postulates • Electric force • Electric field

  4. Charge Model: Basic Postulates • Rubbing an object either adds or removes charge. More vigorous rubbing produces a larger quantity of charge. • There are only 2 kinds of charge: positive & negative. • 2 like charges exert repulsive forces on each other. 2 opposite charges attract each other. • The force between two charges is a long-range force. The magnitude of the force… • increases as the quantity of charge increases. • decreases as the distance between the charges increases.

  5. Charge Model: Basic Postulates, continued… • Neutralobjects have an equal mixture of both positive and negative charge. The rubbing process somehow manages to separate the 2. • There are two types of materials: conductors & insulators. • Conductors are materials through or along which charge moves. • Insulators are materials on or in which charges remain fixed in place. • Charge can be transferred from 1 object to another by contact.

  6. Charge Atoms are made up of.. • Protons & neutrons (nucleus) • protons: “heavy”& positively charged • neutrons: no net charge, about same mass as protons • protons and neutrons are made up of quarks • Electrons • “light” & negatively charged • Fundamental particle, no structure, “orbits” nucleus Notice: • chargeis an inherent property of electrons and protons. • Fundamental unit of charge:

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