Physics 12.3.4b - Electric Field Lines

Electric field lines. A description 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
• electricity
• electric
• electric field
• electric fields
• electric field lines
• field lines
• lines of force
• homeschool
• distance learning
• Derek Owens

[kami645464]

One kind question. Would be thankful if you could answer it.

Wouldn't the both charges at 0:55 attract each other? If not, why? Thanks.

[derekowens]

@kami645464 Yes, they would. If they were allowed to move freely, they would pull together. For this exercise, we are imagining them fixed at their locations, and we're thinking about the shape of the field they produce together. If they were allowed to move, they would attract, and the shape of the field would change accordingly.

Hope that helps!

DO

[emarkp]

Great videos in this series. One thing I'd emphasize is to remind the students multiple times that the lines of force are *not* the path a test charge would follow, but rather show the *force* the test charge would feel at any given point. At 3:17 it kind of looks like the particle would follow the path.

[derekowens]

@emarkp Thanks! And yes, that's an excellent, excellent point. If a student understands that point, then they certainly "get it".

[haxor98]

This has to be the future for teaching. This took like 2 hours of lessons from my teacher and put it in 10 minutes

[derekowens]

@haxor98 Yes, this is the future of teaching!

More videos on the way once I get time....

[pumuk7]

my physics teacher had one full lesson to explain this - and failed. this video did the job in 10 minutes. thanks a bunch!

[LaSalviaBodysurf]

Marry me ?

[WHY70122]

You Sir are awesome. i've been searching for a satisfying video like this for a few days and i end up finding out yours. The way you define every single term in this chapter is very clear + the way you draw all this stuff makes it easier to visualize the whole concept. I was really mad at myself because of the lack of understandings all these materials, but now i'm cleared myself. I hate phys when it takes me hours to completely understand 1 single concept, but now i love it again. :D

[lidyaFACE]

For anyone who has ever played with magnets before, it seems sooo obvious. But then they replace the fun "plus" and "minus" words with positive and negative charges and everyone gets confused >.<

[catwomanox]

I have a killer test tomorrow on this for AP Physics... thank you so much! I finally understand the concept :D

[jesussservant7]

thanks to this dude...i love studying physics

[rachana481]

@emarkp  but then which path will the test charge take ??

thanks !

[MassimoPiai]

@haxor98 well maybe it could've taken YOU 2 minutes if only YOU took the slight inconvenience of opening your textbook, might it not?

[fafase]

At 7.57, you mention the 2 middle forces add up and cancel each other. But I have been told those 2 forces end up randomly choosing an opposite direction when they meet. Meaning that the left one might go up so the right one goes down,represented with 2 arrows turning opposite way with 90 degrees angle (or close). Does that make sense?

[dontgetrushed]

come to my school teach me:) i have a teacher, great qualifications but does not communicate the ideas very well. great series.... really helped me in my exams.