#Lenz's Law
to determine to polarity of the electromagnetic #induction.
This is for Solenoid.
Magnetic field cut through thee solenoid (Magnetic flux linking changes),
produce induced current,
At the same time, this current produce magnetic field in the solenoid, which oppose changes of the magnetic field (bar magnet).
Factor of the direction of induced current,
1. Direction of motion,
2. polarity of magnet
3. The way turn of coil in #solenoid
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