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The noise of the transformer mainly due to
magnetostriction in the iron core
noise generated by cooling fans
mechanical vibration of different parts of transformer
all of the above
magnetostriction in the iron core
The correct answer is A) magnetostriction in the iron core, which is the primary source of noise in transformers. This phenomenon occurs when the core material changes its dimensions due to the magnetic field applied, causing vibrations that result in audible noise.
The correct answer is A) magnetostriction in the iron core, which is the primary source of noise in transformers. This phenomenon occurs when the core material changes its dimensions due to the magnetic field applied, causing vibrations that result in audible noise.
Magnetostriction occurs in ferromagnetic materials where the alignment of magnetic domains under an external magnetic field leads to a change in length. This expansion and contraction create mechanical vibrations that produce noise as the transformer operates.
Magnetostriction is a physical property of ferromagnetic materials.
Transformers vibrate due to changes in magnetization states, leading to noise.
Improves efficiency by reducing losses
Essential for sustainable transformer operation
Noise pollution
Can indicate operational issues if excessive
Used in power transformers
Relevant in audio transformers for sound fidelity
The standard noise level for transformers is usually below 50 dB.
Option B is incorrect as the major noise isn't generated from cooling fans but from magnetostriction.
A is correct тАФ magnetostriction in the iron core is the primary cause of noise in transformers.
Remember that understanding physics concepts such as magnetism can clarify how transformers function and how to identify issues during exams.