________ switches are operated by humans to control power flow to outputs.

• A. Manual
• B. Automatic
• C. Remote
• D. Solid-State

Answer: (A)

Manual switches are devices that require a person to physically move a handle or lever to open or close a circuit, directing power flow to outputs. This direct, user-initiated action is what makes them suitable when human oversight or on-site control is needed, such as during maintenance or safety procedures. In contrast, automatic switches operate by sensors or control logic, remote switches are activated from a distance, and solid-state switches rely on electronic signals without moving contacts. So, when the mechanism of control depends on a person actively changing the state, a manual switch is the best fit.