International Library of Technology · Scranton, International Textbook Co. · leaf 108
n the direction inwhich the conductor is coiled and the direction of the currentin the conductor. To determine the polarity of a solenoid, knowing thedirection of current: Rule.—In looking at the end of the helix, if it is so zuoundthat the current flows around in the direction of the hands ofa… … ELECTRICITY AND MAGNETISM. 1543 end where the observer stands, that end will be a south pole,and the observer will be looking through the helix in thedirection of the lines of force. The polarity of a solenoid can be changed by reversingthe direction of the current in the conductor. MAGNETOMOTIVE…
Electrical engineering
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