Electromagnetic Induction - Faraday's/Lenz's Law

I'm confused about the minus sign in the equation; emf = -N (change in)Magnetic Flux/(change in)time


The book says; The minus sign in the equation above shows that... The induced emf could send an induced current around the circuit that would set up a magnetic field that would oppose the change in magnetic flux that is causing the induced emf. This is called Lenz's law and is really an example of the law of conservation of energy.

I don't get how the induced current was produced?
And how does that produce a magnetic field?
That oppose the change in magnetic flux that caused the induced emf?
how is that an example of the conservation of energy?

Sorry, i just really don't understand and i'm trying my best to
Thankyou in advance

http://www.k****ij-school.com/Study-Material/Class-12/Physics/Faraday’s-law/Lenz’s-law.aspx

See that. Myself, I thinking I'm understanding it more with that. I might give an explanation to you later on, not now though.

The link doesn't work

T

Remember field lines are like force lines representing force.

Imagine if we didn't have Lenz's and that the induced current produces a magnetic field in an opposite direction as to the one shown on that site. Then there'd be an attractive force exerted on the magnet towards the conductor rather than a repulsive force, making accelerate towards the conductor. As the magnetic gets even closer to the conductor due to this acceleration, there's a flux linkage change (there's more field lines per unit area perpendicularly passing through the conductor). Hence on the conductor there's an induced emf and so a current. This current produces a magnetic field as usual (a current produces a magnetic field around it, and a magnetic field, in the form of a magnetic flux linkage change, produces a current. If you are given one, you can work out the direction of the other using the right hand grip rule). Without Lenz's law, the direction of the magnetic field arising from this current would NOT oppose the flux linkage change (right) that formed it, so it "adds" to it. Hence there's an even bigger force on the magnet, making it accelerate further more. But overall, without Lenz's law, you get increasing force out of nowhere, and so increasing acceleration out of nowhere. Therefore you get increasing kinetic energy put of nowhere, going against principle of conservation of energy.

There MAY be a flaw there, I'm new to Lenz's law as well and have recently found it very painful to understand as well .

It's just that, i'm trying really hard to just understand the concepts when i'm reading the textbook but i'm finding it so hard to even do that.
I just can't get my head wrapped around it :| and then someone says something and i get even more confused and i just don't know :c