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13
How do you remember the field around a current carrying coil of wire?
The right hand rule tells you the polarity of a solenoid. The thumb points north and the fingers wrap around in the same direction as the conventional current. 
Flashcard info:
Author: Kamal
Main topic: Physics
Topic: Electricity and Magnetism
School / Univ.: KNES
City: Kuwait
Published: 17.12.2009