What is the function of a three-way switch?

What is the function of a three-way switch?

• A. To control the brightness of a light
• B. To operate multiple lighting circuits
• C. To control a single light from two different locations
• D. To switch from one outlet to another

Answer: (C)

A three-way switch serves the specific function of allowing the control of a single light fixture from two different locations. This is particularly useful in scenarios such as staircases, long hallways, or large rooms where it may be desirable to turn the same light on or off from more than one switch. When using a three-way switch, the circuit is designed such that it has two switches, which work together to control the same light. Each switch has three terminals, which allow the connection to be completed in multiple ways. This design not only enhances convenience but also improves safety and energy efficiency by enabling users to light a space without having to walk to one specific switch location. In contrast, options that refer to adjusting brightness, operating multiple lighting circuits, or switching between outlets do not apply to the functionality of a three-way switch. These actions require different types of switches or controls specifically designed for those purposes.

A three-way switch serves the specific function of allowing the control of a single light fixture from two different locations. This is particularly useful in scenarios such as staircases, long hallways, or large rooms where it may be desirable to turn the same light on or off from more than one switch.

When using a three-way switch, the circuit is designed such that it has two switches, which work together to control the same light. Each switch has three terminals, which allow the connection to be completed in multiple ways. This design not only enhances convenience but also improves safety and energy efficiency by enabling users to light a space without having to walk to one specific switch location.

In contrast, options that refer to adjusting brightness, operating multiple lighting circuits, or switching between outlets do not apply to the functionality of a three-way switch. These actions require different types of switches or controls specifically designed for those purposes.