Which of the following wind energy rotors is mostly used for electric power generation?

The propeller rotor, a horizontal-axis design, is the type mostly used for electric power generation.

The multiblade rotor is used chiefly for water pumping, not large-scale power.

The Savonius rotor is a simple drag device suited to low-power uses.

The Darrieus rotor is a vertical-axis design used less widely for grid power.

High-speed propeller blades capture wind efficiently for electricity.

Modern wind turbines commonly use three-bladed propeller rotors.