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If the supply frequency of a transformer is 50Hz, its magnetostriction frequency would be
25 Hz
200 Hz
50 Hz
100 Hz
100 Hz
The correct answer is D (100 Hz) because the magnetostriction frequency of a transformer is typically twice the supply frequency. Therefore, if the supply frequency is 50 Hz, the magnetostriction frequency is 100 Hz.
The correct answer is D (100 Hz) because the magnetostriction frequency of a transformer is typically twice the supply frequency. Therefore, if the supply frequency is 50 Hz, the magnetostriction frequency is 100 Hz.
fmтАЛ=2fsтАЛ тАФ Magnetostriction frequency where fmтАЛ is the magnetostriction frequency and fsтАЛ is the supply frequency.
The principle of magnetostriction refers to the change in the shape or dimensions of a ferromagnetic material when subjected to a magnetic field. In transformers, this phenomenon occurs at twice the frequency of the alternating current, leading to magnetostrictive vibrations, which are perceived as noise in transformer operation.
Magnetostriction frequency is twice the supply frequency for transformers.
The vibrations produced due to magnetostriction can cause audible noise.
Lower noise operation
Improved efficiency
Increased potential for mechanical stress
Possible heating effects
Transformers in power systems
Induction heating applications
Standard transformer supply frequency is often 50 Hz in India.
Option A (25 Hz) is incorrect as it suggests a quarter of the frequency, not relevant.
Option B (200 Hz) is incorrect as it suggests a four times increase.
Option C (50 Hz) is the original supply frequency and does not consider magnetostriction.
D is correct тАФ the magnetostriction frequency is double the transformer supply frequency.
Remember that in AC circuits, phenomena like magnetostriction often relate to harmonics and multiple frequencies derived from the fundamental supply frequency.