Which type of loses do not occur in transformer :

Options

A. mechanical
B. copper losses
C. hysteresis losses
D. eddy current losses

Answer

### Step-by-Step Solution:

1. **Understanding Transformer Losses**:
- A transformer operates on the principle of electromagnetic induction, where electrical energy is transferred between two or more coils through a magnetic field.
- There are various types of losses that can occur in a transformer, and we need to identify which type does not occur.

2. **Identifying Types of Losses**:
- The common types of losses in a transformer include:
- **Copper Losses**: These occur due to the resistance in the windings (primary and secondary) when current flows through them.
- **Hysteresis Loss**: This loss occurs due to the magnetization and demagnetization of the core material when alternating current (AC) flows through the transformer.
- **Eddy Current Loss**: This loss occurs due to circulating currents induced in the core material itself, caused by changing magnetic fields.
- **Mechanical Loss**: This type of loss is associated with moving parts and mechanical components, which are not present in a transformer.

3. **Analyzing Each Loss Type**:
- **Copper Losses**: Present due to the resistance of the windings.
- **Hysteresis Loss**: Present due to the alternating nature of the current causing magnetization and demagnetization.
- **Eddy Current Loss**: Present due to induced currents in the core material.
- **Mechanical Loss**: Absent in transformers as they do not have moving parts or mechanical components.

4. **Conclusion**:
- Since transformers do not have any mechanical components or moving parts, mechanical losses do not occur in transformers. Therefore, the answer to the question is that **mechanical losses do not occur in transformers**.

### Final Answer:
**Mechanical losses do not occur in transformers.**

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