Help with knowing direction of eddy currents produced? (1 Viewer)

[OMGITzJustin]

I'm a bit confused with an effective way to determine the direction of an eddy current

so in these scenarios, how do you know which way the direction of eddy current produced in the sheet of metal is?

ie. metal moving right from an [xxxxxxxx] magnetic field
or metal moving left into an [xxxxxxx] magnetic field

 

[someth1ng]

I'm a bit confused with an effective way to determine the direction of an eddy current

so in these scenarios, how do you know which way the direction of eddy current produced in the sheet of metal is?

ie. metal moving right from an [xxxxxxxx] magnetic field
or metal moving left into an [xxxxxxx] magnetic field

Anti-clockwise for both assuming that it moved from a region with no magnetic field, an "out of the page" magnetic field or a weaker magnetic field.

To determine the direction of an eddy current, you need to know the right-hand grip rule (pretty much the same as the solenoid rule).
The direction of the eddy current is such that it OPPOSES the CHANGE of flux.

Example:
Initially, there is no magnetic field [ ]
Suddenly, a magnetic field is introduced [::::]
The magnetic field has suddenly become more "out of the page", an eddy current be in such a direction that current induced will create magnetic flux directed "into the page", that is, current is clockwise.

An eddy current aims to make the magnetic flux passing through the metal to be constant, a change will be opposed by the induced eddy current in attempt to maintain constant magnetic flux threading the conductor.