Physics 12.3.4a - Electric Field Lines

[jhoncena9111]

wow.

[WHY70122]

May i ask you 1 question? How far do these lines extend outwards ? Infinity?

[derekowens]

@WHY70122 Basically that's correct. Although they weaken with distance, so well before infinity the field is far too weak to detect.

[Bob3Tim]

What program are you using for these demonstrations?

[lebgirly]

This is amazing

[CApplications]

There's an app for that:

"Field Lines" for iPad

[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]

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

[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.

[riinleen]

@derekowens thanks !

[TheDevilvivek]

charge q is positive or negative

[vball2o11]

you are very helpful! your better then my science teacher :/

[phuot428]

Hey, nice video and illustrations Derek. I was just wondering if you'll do a video on Gauss's Law or if you have it. Thanks.

[denebgarza]

Very nice videos! But shouldn't stronger electric fields be represented as longer lines instead of more lines?

[USAKhmer1]

Thank you for posting this video, it sure helped me too. I understand much better about electricity charges...

[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.

[jenjoyce2]

Do you have any videos about magnetism?

[ppark20]

very good explanations...amazing videos...im just wondering, what do you do if you dont mind answering?

[derekowens]

I'm a math and physics teacher. I teach 7th through 12th grade. I mostly teach groups of homeschoolers in the Atlanta area, and also offer distance learning courses. Glad you like the videos!

D.O.

[ccysyr]

@derekowens can i know why only use positive charge as a test charge rather than a negative charge?

[wongngmui]

thank you so much

[WorldCollections]

You simply cleared my doubts ! thanks !

[lyzia202]

THANK YOU SO MUCH. This is really helpfull