CBSE Class 12 Physics – Electromagnetic Induction

Chapter Overview

This chapter focuses on how changing magnetic flux induces emf and current. You’ll learn magnetic flux, Faraday’s & Lenz’s laws, motional emf, eddy currents, self- & mutual inductance, and applications such as AC generators, transformers, and induction devices.

Important Keywords

• Magnetic Flux (Φ): B·A·cosθ, unit Weber (Wb). :contentReference[oaicite:1]{index=1}
• Electromagnetic Induction: Generating emf by changing magnetic flux. :contentReference[oaicite:2]{index=2}
• Faraday’s Law: emf = –dΦ/dt. :contentReference[oaicite:3]{index=3}
• Lenz’s Law: Induced emf opposes its cause. :contentReference[oaicite:4]{index=4}
• Motional Emf: ε = Bℓv for moving conductors.
• Eddy Currents: Circulating induced currents causing heating/loss. :contentReference[oaicite:5]{index=5}
• Self Inductance (L): emf opposing change in own current. :contentReference[oaicite:6]{index=6}
• Mutual Inductance (M): emf in one coil due to current change in another. :contentReference[oaicite:7]{index=7}
• AC Generator: Converts mechanical energy to AC via rotating coils. :contentReference[oaicite:8]{index=8}