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In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are
- a)friction and windage losses
- b)copper losses
- c)hysteresis and eddy current losses
- d)none of the above
Correct answer is option 'C'. Can you explain this answer?
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In a given transformer for given applied voltage, losses which remain ...
Understanding Transformer Losses
Transformers experience various types of losses, which can be broadly categorized into constant (fixed) and variable (dependent on load). Among these, some losses remain constant irrespective of load changes.
Types of Constant Losses
- Hysteresis Losses:
- These losses occur due to the reversal of magnetization in the core material.
- The energy loss is proportional to the frequency of operation and the area of the hysteresis loop, making it independent of the load.
- Eddy Current Losses:
- Generated from induced currents circulating within the core material due to the changing magnetic field.
- Like hysteresis losses, eddy current losses depend on the material properties and frequency, not on the load.
Comparison with Other Losses
- Friction and Windage Losses:
- These are mechanical losses caused by moving parts and cooling fans, often dependent on operational speed but not load.
- Copper Losses:
- These losses arise from the resistance of the copper windings and vary with the square of the load current (I²R losses). Thus, they are not constant.
Conclusion
In summary, the correct answer is option 'C', as hysteresis and eddy current losses are the constant losses that remain unchanged with varying load conditions in a transformer. Understanding these losses is crucial for efficient transformer design and operation.
Transformers experience various types of losses, which can be broadly categorized into constant (fixed) and variable (dependent on load). Among these, some losses remain constant irrespective of load changes.
Types of Constant Losses
- Hysteresis Losses:
- These losses occur due to the reversal of magnetization in the core material.
- The energy loss is proportional to the frequency of operation and the area of the hysteresis loop, making it independent of the load.
- Eddy Current Losses:
- Generated from induced currents circulating within the core material due to the changing magnetic field.
- Like hysteresis losses, eddy current losses depend on the material properties and frequency, not on the load.
Comparison with Other Losses
- Friction and Windage Losses:
- These are mechanical losses caused by moving parts and cooling fans, often dependent on operational speed but not load.
- Copper Losses:
- These losses arise from the resistance of the copper windings and vary with the square of the load current (I²R losses). Thus, they are not constant.
Conclusion
In summary, the correct answer is option 'C', as hysteresis and eddy current losses are the constant losses that remain unchanged with varying load conditions in a transformer. Understanding these losses is crucial for efficient transformer design and operation.
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In a given transformer for given applied voltage, losses which remain constant irrespective of load changes area)friction and windage lossesb)copper lossesc)hysteresis and eddy current lossesd)none of the aboveCorrect answer is option 'C'. Can you explain this answer?
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