On power lines, transformers are used primarily to convert voltage to safe levels for devices.

On power lines, transformers are used primarily to convert voltage to safe levels for devices.

• A. To convert the voltage to a voltage that is safe to plug devices into
• B. To increase the voltage for long-distance transmission
• C. To store electrical energy
• D. To measure current

Answer: (A)

Transformers change voltage using magnetic induction, so the same amount of power can be delivered with different voltages. On the distribution network, a transformer steps the high transmission voltage down to a lower, safer level that can be used by homes and devices. That safe voltage is what makes it possible to plug in appliances without risking shock or damage. While transformers can also raise voltage for long-distance transmission, the role described here focuses on delivering a voltage suitable for everyday use. They don’t store energy or measure current, which are functions of other components.

Transformers change voltage using magnetic induction, so the same amount of power can be delivered with different voltages. On the distribution network, a transformer steps the high transmission voltage down to a lower, safer level that can be used by homes and devices. That safe voltage is what makes it possible to plug in appliances without risking shock or damage. While transformers can also raise voltage for long-distance transmission, the role described here focuses on delivering a voltage suitable for everyday use. They don’t store energy or measure current, which are functions of other components.