Transformer cores are laminated to reduce ……*1 pointLenz’s currentFaraday’s electromagnetic inductionEddy currentsAmpere’s current

Break Down the Problem

1. Identify the purpose of laminating transformer cores.
2. Understand the impact of eddy currents in transformers.

Relevant Concepts

1. Eddy currents are loops of electric current induced within conductors by a changing magnetic field in the conductor, due to Faraday's law of electromagnetic induction.
2. Laminating the core increases the electrical resistance, thereby reducing the magnitude of eddy currents.

Analysis and Detail

1. When transformers operate, changing magnetic fields induce currents in the core material. These induced currents can create significant losses in the form of heat, reducing the efficiency of transformers.
2. Laminating the cores involves using thin layers of iron or another magnetic material, insulated from each other, which restricts the flow of these eddy currents and minimizes energy loss.

Verify and Summarize

By reducing eddy currents, laminated transformer cores enhance the efficiency of the transformer, allowing it to operate more effectively at the desired frequency.

Final Answer

Transformer cores are laminated to reduce eddy currents.