In an electrical power distribution system, a step-down transformer is typically located in which part of the circuit?

• A. The power generation circuit at the power plant
• B. The high-voltage transmission circuit
• C. The distribution circuit near the end user
• D. The control circuit inside the generator

Answer: (C)

Verified step by step guidance

1. Understand the role of transformers in power distribution systems: transformers are used to change voltage levels to optimize power transmission and distribution.
2. Recall that power plants generate electricity at a certain voltage, which is then stepped up to a very high voltage for efficient long-distance transmission to reduce energy loss.
3. Recognize that after high-voltage transmission, the voltage must be reduced to safer, usable levels before reaching consumers; this is where step-down transformers come into play.
4. Identify that step-down transformers are typically located in the distribution circuit near the end user to lower the voltage from transmission levels to levels suitable for homes and businesses.
5. Conclude that the step-down transformer is not located at the power plant generation circuit, high-voltage transmission circuit, or inside the generator control circuit, but rather in the distribution circuit close to the end user.