Ayesha (10:05 AM): Okay, let's kick off. The main topic is Faraday's Law of Induction. Usman, you mentioned you were reviewing it?
Usman (10:06 AM): Yeah, I get the basics, that a changing magnetic field creates a current. But I get stuck on the direction of the current. That's Lenz's Law, right?
Bilal (10:09 AM): Exactly. Think of it like this: nature is lazy. The induced current will always flow in a direction that creates a magnetic field to oppose the change that caused it. If the magnetic flux is increasing, the induced field will try to decrease it.
Ayesha (10:15 AM): That's a great way to put it. So, for question 5 on the worksheet, the magnet is moving *into* the coil, which increases the flux. So the induced magnetic field must point *out* of the coil.
Usman (10:16 AM): Right! And using the right-hand grip rule, if your thumb points in the direction of the induced field, your fingers curl in the direction of the current. I see it now.
Ayesha (10:18 AM): Perfect! That's the core concept. We can move on to calculating the EMF next.