What is the function of a transformer in the electrical distribution system?

• A. To convert AC to DC
• B. To change the voltage level of electricity
• C. To store electrical energy
• D. To provide electrical grounding

Answer: (B)

The primary function of a transformer in the electrical distribution system is to change the voltage level of electricity. Transformers operate based on the principle of electromagnetic induction, allowing them to increase (step-up) or decrease (step-down) voltage as needed for efficient transmission and distribution of electrical power.

In high voltage transmission lines, higher voltages are used to reduce energy loss over long distances. When this electricity reaches its destination, transformers are used to lower the voltage to safer levels for residential or commercial use. Thus, the ability to modify voltage levels ensures that electricity can be transmitted efficiently while also being used safely at points of consumption.