Magnetic field around a Wire

The High School Physics Project: Showing how to map a field and how to map that field around a current carrying wire.

Category:

Howto & Style

Tags:

• Altman
• Physics
• Electricty
• Magnetism

[Kaleetos]

@Starcross42 I know this is a very late response, but the direction of the magnetic field's rotation that you are suggesting in the video is incorrect. Even the compasses below your hand show that the rotation is going in the opposite direction. EDDY 1066 above is correct. The grip rule only works with the right hand with the thumb pointing in the direction of current.

[Starcross42]

@Kaleetos At the end you will notice that I deal with both ways of 'mapping' the magnetic field.  At the high school level we teach current from neg to pos. But I prepare my students to deal with both because, depending on the university and/or professor, they argue both.

[EDDY1066]

you got that wrong mate the magnetic feild dose change direction when you change the direction of curent. no need to use right & left cause its just the right hand grip rule that works, thumb indicating curent flow and fingers pointing in the direction the magnetic feild is rotating. dont get it confused with flemmings right hand rule for generators and the left hand rule for motors.

[Starcross42]

I understand. This is about something else. Different schools of thought teach positive current, and some teach negative current. When my high school students go off to college they get confused depending on the particular university. This video was to help them understand that, regardless of how you define current, the magnetic field will be consistent.

[noviobatavia]

thanks for using halfe a forrest for your staples;)

magnets rule!

[Starcross42]

The truth is that this bin is 'seldom' emptied. This could represent a year of copies at a school... but yes... people waste a lot of paper. My entire class is going paperless with the use of these videos.

[rulz492]

@TheOneToxic agreed

[theniclasridiclas]

Compasses. Compi? ha

[ICEGTN]

3:07 is it direction of current or electrons?

[carbon0f1ce]

positive to negitive ftw

[fuelban]

Fantastic video guy's, very interesting stuff.

thanks.

Thom in Scotland.

[TheOneToxic]

@Starcross42

I suggest you stick to physics terms, conventional current (+ to -) and electron flow (- to +)

Dont say positive current etc, some wont understand

[cpcomedy314]

I watched the rest of the video because I saw Bobby Labontes car under the magnets at the beginning.

[MnMgrl913]

WOAH!!!! that black stuff is awesome :D