We can reduce eddy currents in the core of transformer

Options

A. The number of turns in the secondary coil is made considerably large
B. A laminated core is used
C. A step down transformer is used
D. A high voltage alternatng weak current is used

Answer

To solve the question of how to reduce eddy currents in the core of a transformer, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Eddy Currents**:
- Eddy currents are loops of electric current that are induced within conductors by a changing magnetic field in the conductor. In the case of a transformer, these currents can flow in the core material and lead to energy losses in the form of heat.

2. **Identifying the Core Structure**:
- The core of a transformer is typically made of a magnetic material that enhances the magnetic field and improves the efficiency of the transformer. However, this core can also support the formation of eddy currents.

3. **Laminated Core Concept**:
- To reduce eddy currents, one effective method is to use a laminated core. This involves constructing the core from thin sheets of magnetic material (laminations) that are insulated from each other. The insulation prevents the flow of eddy currents across the sheets.

4. **Benefits of Laminated Cores**:
- By using laminated sheets, the area available for the eddy currents to flow is significantly reduced, which minimizes the magnitude of these currents and thus reduces energy losses.

5. **Conclusion**:
- The most effective method to reduce eddy currents in the core of a transformer is to use laminated cores. Therefore, the correct answer to the question is **Option B: Laminated Core**.