1 / 11

ELECTRIC CIRCUITS 20.1

ELECTRIC CIRCUITS 20.1. Chapter Twenty: Electric Circuits. 20.1 Charge 20.2 Electric Circuits 20.3 Current and Voltage 20.4 Resistance and Ohm’s Law . Chapter 20.1 Learning Goals. Define static electricity and discuss its causes.

gates
Télécharger la présentation

ELECTRIC CIRCUITS 20.1

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ELECTRIC CIRCUITS 20.1

  2. Chapter Twenty: Electric Circuits • 20.1 Charge • 20.2 Electric Circuits • 20.3 Current and Voltage • 20.4 Resistance and Ohm’s Law

  3. Chapter 20.1 Learning Goals • Define static electricity and discuss its causes. • Explain what it means when an object is electrically charged. • Discuss the relationship between like and unlike charges.

  4. Key Question: What is static electricity? Investigation 20C Electric Charge

  5. 20.1 Electric charge • Electric charge, like mass, is also fundamental property of matter. • Inside atoms found in matter, attraction between positive and negative charges holds the atoms together.

  6. 20.1 Charge • Virtually all the matter around you has electric charge because atoms are made of electrons and protons (and neutrons). • Because ordinary matter has zero net (total) charge, most matter acts as if there is no electric charge at all.

  7. 20.1 Electric and magnetic forces • Whether two charges attract or repel depends on whether they have the same or opposite sign. • A positive charge attracts a negative charge and vice versa. • Two similar charges repel each other.

  8. 20.1 Electrical forces • The unit of charge is the coulomb (C). The name was chosen in honor of • Charles Augustin de Coulomb (1736-1806), the French physicist who performed the first accurate measurements of the force between charges.

  9. 20.1 Electrical forces • Electric forces are incredibly strong. • A millimeter cube of carbon the size of a pencil point contains about 77 coulombs of positive and negative charge.

  10. 20.1 Electrical forces • Lightning is caused by a giant buildup of static charge. • The cloud, air, and ground can act like a giant circuit. • All the accumulated negative charges flow from the cloud to the ground, heating the air along the path (to as much as 20,000°C) so that it glows like a bright streak of light.

More Related