download and print yourself a copy of this ..
http://www.reliance.com/mtr/mtrthrmn.htm
but be aware it is old - observe it uses CGS units, which is what i was initially taught.
So it may speak of current in 'wrong direction', ie direction of electron drift.
Decades ago practical electricity was taught that way, current flow from negative to positive..
Very early transistor manuals cautioned engineers to be careful and think in terms of their conventional textbook current, not the practical electron flow many of us used in vacuum tube days. In vacuum tubes you see, electrons physically leave the negative cathode and arrive at the positive anode. So we traced them on around the circuit that direction, as if they were "charge".
So his "left hand rule" will be your "right hand rule".
In my day one needed to be fluent in both schools of thought. My technicians teased me about "engineer's current" versus "real current". They'd indicate the direction of their "real" current with green arrows, and my "engineer's " current with brown ones, obviously...
We had a lot of fun.
But i digress. Sorry.
old jim