Understanding Induced EMF: The Relationship Between Current and Flux

[nabliat]

http://i32.tinypic.com/s28adc.jpg
"
as the current
increases with time, the magnetic flux through the circuit loop due to this current also
increases with time.


This increasing flux creates an induced emf in the circuit.

The
direction of the induced emf is such that it would cause an induced current in the loop
(if the loop did not already carry a current), which would establish a magnetic field
opposing the change in the original magnetic field.
"
i can't understand the last part
what current the change in flux creates
in what direction??

 

[mighty2000]

Hello,

The change in magnetic flux through the circuit loop creates an induced emf, which in turn creates an induced current in the loop. This induced current flows in a direction that opposes the change in the original magnetic field. This is known as Lenz's law, which states that the direction of the induced current will always be such that it opposes the change in the magnetic flux that caused it. So, if the magnetic flux is increasing, the induced current will flow in a direction that creates a magnetic field that opposes the increase in flux. This is why in the diagram, the induced current is shown flowing in the opposite direction of the original current. I hope this helps clarify the last part for you.