PHYSICS F5 I ELECTROMAGNETISM I TRANSFORMER I PART 2

Knowledge you should achieved after following this lesson:

A) Cause of energy loss in transformer and ways to reduce it;

1. Eddy current - Use laminated iron core that contain thin sheets of soft iron that are insulated from one another

2. Leakage of magnetic field lines - Wind the secondary coil on top of the primary coil

3. Magnetisation and demagnetisation of core - Soft iron core is used as it is easily magnetize and demagnetize

4. Resistance of the coils - Thick wires made of copper or silver used to make the coil as they have a low resistance

B) The efficiency of a transformer:

1. Efficiency is the measure of power transmitted from the primary to the secondary circuit , and is defined by

Efficiency = ( Power Output / Power Input ) x 100%
= ( VsIs / VpIp ) x 100%

2. A well-designed transformers have efficiency up to 99%

PREVIOUS LESSON;
PHYSICS I ELECTROMAGNETISM I TRANSFORMER PART 1;
https://youtu.be/rc48jEnBBds

NEXT LESSON;
PHYSICS I ELECTROMAGNETISM I GENERATION AND TRANSMISSION OF ELECTRICITY I PART 1;
https://youtu.be/wx7zoj1fifw

EXERCISES ON THIS CHAPTER;
https://drive.google.com/file/d/1TrMazwQM7q9BnNsSLupdyFOfa5kY4v_p/view?usp=sharing

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