Physics 12.3.4a - Electric Field Lines

Electric field lines. An explanation with visual sketches. From the physics course by Derek Owens. The distance learning course is available at http://www.derekowens.com

Category:

Education

Tags:

• Physics
• electric
• electricity
• electric field
• electric fields
• electric field lines
• field lines
• lines of force
• homeschool
• distance learning
• Derek Owens

[janthomas906]

Hi please answer my question thank you :)

if a negative point charge and a postiive point charge would attract each other, their field line would always come in pair, how about if 2 positive point charge is together, where would their feild line end up? or where would their field line go? thank u!

[derekowens]

@janthomas906 The field lines would extend away from the charges forever, although the intensity of the field would weaken with distance.

[riinleen]

in solving the number of electric lines, what is the unit ??? please answer

[derekowens]

@riinleen I don't think there is a specific calculation or unit for the number of lines. It is simply a way to visually picture the electric field, and is not a mathematically precise representation.

[2Bitter2bSweet]

@derekowens...in your previous video..you drew a collection of + charges...but how is that possible? don't like charges repel each other?

[derekowens]

@2Bitter2bSweet Yes, that's right. If left floating freely in space they would repel each other. Sometimes, though, we imagine them fixed in place, and then think about the field that they would have around them. That's what I was doing in that last video.

[Bob3Tim]

What program are you using for these demonstrations?

[lebgirly]

This is amazing

[CApplications]

There's an app for that:

"Field Lines" for iPad

[riinleen]

@derekowens thanks !

[riinleen]

can you help me with my assignment?? it goes like this.

three charges are placed on the three corners of a square. Each side of square is 30 cm, where Q1= 3.0x10^-6, Q2=5x10^-6, and Q3=-8x10^-6 , what is the force on the unknown charge at the fourth corner??

PLEASE HELP. THANKS

[TheDevilvivek]

charge q is positive or negative