Humming noise in the transformer can be minimized by

Humming noise in the transformer can be minimized by:

1. Tightening laminations
2. Using lower flux densities
3. Using suitable paddings and oil barriers
4. All of these
5. None of these

Correct answer: 4. All of these

The humming or Magnetostriction phenomenon in a transformer can be reduced using the following three methods:

• Tightening laminations
• Using lower flux densities
• Using suitable paddings and oil barriers