I'm not sure if I'm misinterpreting, but I couldn't get past this point in the video as it seems they are assuming the current flows from - to + and its confusing me a lot.


Also in another video they seem to assume the flux direction in a solenoid in reverse to what my textbook says (right hand rule)

Are they using a different convention or is my understanding flawed ?

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    \$\begingroup\$ In the first video, they are using electron (negative) current flow, rather than Conventional (positive) flow. \$\endgroup\$ Commented Jun 2, 2018 at 4:04
  • \$\begingroup\$ @PeterBennett Thank you, it seems they're strictly using the electron flow for current direction. Is this the reason the direction of magnetic field in the second video is in reverse ? Or is my understanding of right hand rule incorrect? they're nice videos, but with the opposite directions for current/magnetic field, I'm finding it a bit confusing to follow.. \$\endgroup\$
    – AgentS
    Commented Jun 2, 2018 at 4:09
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    \$\begingroup\$ If you use electron (negative) current, then you use your left hand instead of your right hand. \$\endgroup\$ Commented Jun 2, 2018 at 4:29
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    \$\begingroup\$ Ah okay I'll give it a try using the left hand. Thanks again :) \$\endgroup\$
    – AgentS
    Commented Jun 2, 2018 at 4:43

1 Answer 1


The US military uses electron current in their electronics training materials.


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