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If the applied voltage to a transformer primary isincreased by keeping the V/f ratio fixed, then the magnetizing current and the core loss will,respectively:
- a)decrease and remain the same,
- b)increase and decrease.
- c)both remain the same.
- d)remain the same and increase.
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
If the applied voltage to a transformer primary isincreased by keeping...
Magnetising current remains same bcz B is constant
B proportional to V/F
as voltage propotional to iron lossess core loss increaeses
B proportional to V/F
as voltage propotional to iron lossess core loss increaeses
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If the applied voltage to a transformer primary isincreased by keeping...
Explanation:
When the applied voltage to a transformer primary is increased by keeping the V/f ratio fixed, the following changes occur:
1. Magnetizing current:
- The magnetizing current is the current required to magnetize the transformer core.
- It is proportional to the applied voltage.
- When the applied voltage is increased, the magnetizing current also increases.
- Therefore, the magnetizing current remains the same when the applied voltage is increased while keeping the V/f ratio fixed.
2. Core loss:
- The core loss is the power loss that occurs in the transformer core due to hysteresis and eddy currents.
- It is proportional to the square of the applied voltage.
- When the applied voltage is increased, the core loss also increases.
- Therefore, the core loss increases when the applied voltage is increased while keeping the V/f ratio fixed.
Conclusion:
Hence, the correct answer is option D, i.e., the magnetizing current remains the same and the core loss increases when the applied voltage to a transformer primary is increased by keeping the V/f ratio fixed.
When the applied voltage to a transformer primary is increased by keeping the V/f ratio fixed, the following changes occur:
1. Magnetizing current:
- The magnetizing current is the current required to magnetize the transformer core.
- It is proportional to the applied voltage.
- When the applied voltage is increased, the magnetizing current also increases.
- Therefore, the magnetizing current remains the same when the applied voltage is increased while keeping the V/f ratio fixed.
2. Core loss:
- The core loss is the power loss that occurs in the transformer core due to hysteresis and eddy currents.
- It is proportional to the square of the applied voltage.
- When the applied voltage is increased, the core loss also increases.
- Therefore, the core loss increases when the applied voltage is increased while keeping the V/f ratio fixed.
Conclusion:
Hence, the correct answer is option D, i.e., the magnetizing current remains the same and the core loss increases when the applied voltage to a transformer primary is increased by keeping the V/f ratio fixed.
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If the applied voltage to a transformer primary isincreased by keeping the V/f ratio fixed, then the magnetizing current and the core loss will,respectively:a)decrease and remain the same,b)increase and decrease.c)both remain the same.d)remain the same and increase.Correct answer is option 'D'. Can you explain this answer?
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