Why do large transformers heat up? Identify the dominant causes. Large power transformers heat and are oil-cooled; select the main physical loss mechanisms causing the heating. Choose the correct option.
IIT JEE
Physics
Difficulty: Easy
Choose an option
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ACore losses (hysteresis and eddy currents) and copper losses (I²R in windings)
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BOnly radiation from the tank
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COnly mechanical vibration
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DCooling oil chemical reactions
Answer
Correct Answer: Core losses (hysteresis and eddy currents) and copper losses (I²R in windings)
Explanation
Concept
- Core (iron) losses: hysteresis + eddy currents in the magnetic core.
- Copper losses: I²R heating in primary and secondary windings.
Final AnswerCore losses (hysteresis and eddy currents) and copper losses (I²R in windings)