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The applied voltage of a certain transformer isi ncreased by 75% while the frequency of the applied voltage is reduced by 25%. The maximum core flux density will
- a)increase by seven times
- b)increase by three times
- c)reduce to one quarter
- d)remain the same
Correct answer is option 'B'. Can you explain this answer?
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The applied voltage of a certain transformer isi ncreased by 75% while...
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Explanation:
When the applied voltage of a transformer is increased, it results in a higher magnetic flux in the core. Similarly, when the frequency of the applied voltage is reduced, it also increases the magnetic flux in the core.
Effect of increased voltage:
- The voltage applied to a transformer determines the magnetic field strength in the core.
- When the voltage is increased, the magnetic field strength also increases.
- This causes the core flux density to increase.
Effect of reduced frequency:
- The frequency of the applied voltage determines how fast the magnetic field changes in the core.
- When the frequency is reduced, the magnetic field changes at a slower rate.
- This allows more time for the magnetic flux to build up in the core, resulting in a higher core flux density.
Combined effect:
- When the voltage is increased by 75%, it means the magnetic field strength is increased by the same percentage.
- When the frequency is reduced by 25%, it means the time for the magnetic flux to build up is increased by the same percentage.
- Therefore, the combined effect is an increase in the core flux density.
Answer:
- The maximum core flux density will increase by three times.
When the applied voltage of a transformer is increased, it results in a higher magnetic flux in the core. Similarly, when the frequency of the applied voltage is reduced, it also increases the magnetic flux in the core.
Effect of increased voltage:
- The voltage applied to a transformer determines the magnetic field strength in the core.
- When the voltage is increased, the magnetic field strength also increases.
- This causes the core flux density to increase.
Effect of reduced frequency:
- The frequency of the applied voltage determines how fast the magnetic field changes in the core.
- When the frequency is reduced, the magnetic field changes at a slower rate.
- This allows more time for the magnetic flux to build up in the core, resulting in a higher core flux density.
Combined effect:
- When the voltage is increased by 75%, it means the magnetic field strength is increased by the same percentage.
- When the frequency is reduced by 25%, it means the time for the magnetic flux to build up is increased by the same percentage.
- Therefore, the combined effect is an increase in the core flux density.
Answer:
- The maximum core flux density will increase by three times.
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The applied voltage of a certain transformer isi ncreased by 75% while the frequency of the applied voltage is reduced by 25%. The maximum core flux density willa)increase by seven timesb)increase by three timesc)reduce to one quarterd)remain the sameCorrect answer is option 'B'. Can you explain this answer?
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