What is the primary function of a step-up transformer?

What is the primary function of a step-up transformer?

• A. To decrease secondary voltage
• B. To produce a higher secondary voltage than primary voltage
• C. To equalize voltage between primary and secondary
• D. To increase current output

Answer: (B)

The primary function of a step-up transformer is to produce a higher secondary voltage than the primary voltage. This is achieved through the transformer's design, which involves a greater number of turns of wire in the secondary coil compared to the primary coil. When alternating current (AC) flows through the primary winding, it creates a magnetic field that induces a higher voltage in the secondary winding due to this turn ratio. This characteristic is essential in applications where voltage needs to be increased for efficient long-distance transmission of electricity. By stepping up the voltage, the current can be reduced, minimizing energy loss due to heat in the transmission lines. This makes the system more efficient for transporting power over long distances. While transformers can also affect current, the defining function of a step-up transformer specifically revolves around its ability to increase voltage, which aligns with the correct answer.

The primary function of a step-up transformer is to produce a higher secondary voltage than the primary voltage. This is achieved through the transformer's design, which involves a greater number of turns of wire in the secondary coil compared to the primary coil. When alternating current (AC) flows through the primary winding, it creates a magnetic field that induces a higher voltage in the secondary winding due to this turn ratio.

This characteristic is essential in applications where voltage needs to be increased for efficient long-distance transmission of electricity. By stepping up the voltage, the current can be reduced, minimizing energy loss due to heat in the transmission lines. This makes the system more efficient for transporting power over long distances.

While transformers can also affect current, the defining function of a step-up transformer specifically revolves around its ability to increase voltage, which aligns with the correct answer.