Electromagnetic Induction – Class 12 Physics Notes | CBSE NCERT Based
📚 Chapter: Electromagnetic Induction – Full Detailed Notes --- 🔸 1. Introduction Electromagnetic Induction is the phenomenon of inducing current or EMF in a conductor when the magnetic flux linked with it changes. Discovered by Michael Faraday in 1831. --- 🔹 2. Faraday’s Laws of Electromagnetic Induction ✅ First Law Whenever magnetic flux linked with a coil changes, an EMF is induced. ✅ Second Law The magnitude of induced EMF is directly proportional to the rate of change of magnetic flux: \text{EMF} = -\frac{d\Phi}{dt} Negative sign from Lenz’s Law --- 🔹 3. Lenz’s Law The direction of induced EMF is such that it opposes the cause that produced it. It ensures conservation of energy. --- 🔹 4. Magnetic Flux (Φ) \Phi = B \cdot A \cdot \cos\theta = Magnetic field = Area = Angle between B and normal to area --- 🔹 5. Induced EMF Types Static (by changing area/orientation) Dynamic (by relative motion of coil and magnet) --- 🔹 6. Motional EMF When a conductor of ...