Left hand or right hand rule

Discussion in 'Homework Help' started by fanner_b, Mar 22, 2018.

  1. fanner_b

    Thread Starter New Member

    Mar 21, 2018
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    0
    Hello,

    I'm confused with the left hand and right hand rule as it's relates to knowing the current direction within generators and motors.

    The textbook we are using for our class is Electricity 1 by Thomas Kubala. In this book, the left hand rule is applied to generators and the right hand rule is applied to motors. However upon looking on the internet for more information, it appears that most links (of what I believe are reputable sources) state the left hand rule is for motors and the right hand is for generators.

    I have a hard time believing that the textbook is incorrect. I also am not disputing what I'm reading online.

    What am I failing to understand here....
     
  2. BR-549

    AAC Fanatic!

    Sep 22, 2013
    4,936
    1,346
    There are several explanations...and therefore confusion about this.

    IMO.....it comes down to what polarity of charge....OR of current, that you are using.

    For positive current(conventional current).....use right hand rule.

    For negative current(electron flow) or negative charge.....use left hand rule.
     
  3. MrAl

    AAC Fanatic!

    Jun 17, 2014
    6,234
    1,352
    Hi,

    I have a video on YouTube that illustrates this but i'd have to find it :)
    It uses a CRT oscilloscope electron beam as the 'current source' and shows how it bends with a nearby magnetic field.
     
  4. fanner_b

    Thread Starter New Member

    Mar 21, 2018
    2
    0
    Thank you for your replies! Conventional current vs electron flow and that makes sense now.
     
  5. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
    8,149
    1,411
    Remember the car MG.

    Motor (L) Generator (R)
     
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