The document outlines the principles of transformers, including the EMF equation and voltage transformation ratio. It emphasizes the working principle of mutual induction and describes transformers as devices that either step up or step down voltage for transmitting electrical energy. Various applications and problem-solving related to transformers are also included.

1. Annexure – I Notes of Lesson
Unit – 4 Transformers
22. EMF equation & Transformation ratio

2. EMF equation of Transformer

3. EMF equation of Transformer

4. EMF equation of Transformer

5. Voltage Transformation Ratio (K)

6. Problems

7. Problems

8. Problems

10. Problems

11. Mind Map
11
Principle of operation
Mutual induction
EMF
equation of
Transformer
Applications
Isolation purpose,
Step up & step
down the voltage,
Transmitting
electrical energy

12. Summary
 Transformer– static device to increase or decrease the voltage, to
transform electrical energy from one circuit to other. The working
principle is mutual induction.
 Emf Equation
E1 - self induced emf
E2 - mutually induced emf
 Voltage Transformation Ration (K):