Question

Which of the following losses in transformer is zero even at full load?
1. Core loss
2. Friction loss
3. Eddy current loss
4. Hysteresis loss

Answer 1

Correct Answer - Option 2 : Friction loss
Transformer:

• A transformer is a static device i.e. transformer does not consist of any type of moving component, due to which there is no frictional loss in the transformer.
• Hence the efficiency of the transformer is highest among the all other electrical devices. It is generally more than 90%.

 

Important Points:

• The transformer works on the principle of Faraday’s Electromagnetic Induction.
• The sum of eddy current loss & hysteresis loss is known as iron loss or core loss, which are occurred in the core of the transformer.
• An open circuit test is performed to calculate the iron or core losses of the transformer.
• A short circuit test is used to find a copper loss in the transformer.