Electromagnetic Induction and Alternating Currents Definition, Types, Examples & Uses

Electromagnetic Induction and Alternating Currents

Subject: General Science

Book: NCERT Physics Class 12

Study of changing magnetic fields and induced currents.
- **Faraday’s Laws**:
- Induced EMF and current.
- **Lenz’s Law**:
- Direction of induced current.
- **Transformers and AC Circuits**:
- Working of transformers and power transmission.

**Possible Exam Questions:**
1. State and explain Faraday’s laws of electromagnetic induction.
2. Derive the formula for self-inductance and mutual inductance.
3. How do transformers work? Explain their efficiency.
4. What is the significance of Lenz’s Law?
5. Explain the concept of power factor in AC circuits.