join the ap-physics-1 course

๐ŸŽ–๏ธfiveable certificate upon completion

โฑ๏ธ 2 min read

๐Ÿ“ย ย 

ap physics 1

ย โ€ขย 

study guide

ย โ€ขย 

Unit 8

8.2 Electric Charge

#electricity

#charge

#electricfields


written by

Peter Apps

peter apps

published on april 16, 2020

Last updated on June 8, 2020

Enduring Understandingย 5.A

Certain quantities are conserved, in the sense that the changes of those quantities in a given system are always equal to the transfer of that quantity to or from the system by all possible interactions with other systems.

Enduring Understanding 1.B

Electric charge is a property of an object or a system that affects its interactions with other objects or systems containing charge.

Essential Knowledge 1.B.2

There are only two kinds of electric charge. Neutral objects or systems contain equal quantities of positive and negative charge, with the exception of some fundamental particles that have no electric charge.

Interactions with Other Objects

Charged objects will attract or repel other objects. These interactions follow a simple rule: Likes Repel, Opposites Attract. If two objects have similar charges (both negative or both positive) they will repel each other. If the objects have opposite charges (one positive and one negative) they will attract each other. A neutral object will always be attracted to a charged object. To explore why this is, check out this PhET simulation.

Electric Fields

Note: AP Physics 1 doesnโ€™t cover the idea of electric fields. This is included as a basis for discussing electric force in the next key idea. AP Physics 2 goes into much greater depth with electric and magnetic fields.

The region around a charged object can be described by an electric field. Electric field lines show the direction a positive charge will travel when placed near the charged object. If placed near a positive object it will be repelled, therefore the electric field lines point away from a positive object.

Likewise, the test charge will be attracted to a negative object and the field lines will point in. This is useful in visualizing the direction the electrostatic force will be acting in. The images below show some common arrangements, or check out this PhET simulation and create your own.

https://firebasestorage.googleapis.com/v0/b/fiveable-92889.appspot.com/o/images%2FScreen%20Shot%202020-04-15%20at%209.28.38%20PM.png?alt=media&token=b9a864f3-5300-4dfc-9c0e-b09b52e584dd
Fiveable

join more students

create an account on fiveable

๐ŸŽฅWatch: AP Physics 1 - Unit 8 Streams

Fiveable Logo

2550 north lake drive
suite 2
milwaukee, wi 53211

92% of Fiveable students earned a 3 or higher on their 2020 AP Exams.

*apยฎ and advanced placementยฎ are registered trademarks of the college board, which was not involved in the production of, and does not endorse, this product.

ยฉ fiveable 2020 | all rights reserved.