___ braking of a motor involves the application of a DC voltage to the windings of an AC motor after AC power is removed.

The correct choice pertains to a braking method that is specifically focused on applying a DC voltage to the windings of an AC motor after the AC power source has been disconnected. This method is known as electric braking.

Electric braking is often utilized to quickly decelerate motor systems by utilizing the inherent inductance of the motor windings. When DC voltage is applied, it creates a stationary magnetic field that interacts with the rotor's movement, generating a braking torque that effectively slows down the motor. This method is particularly efficient in applications requiring rapid stopping and is characterized by its ability to provide control over the braking process.

In contrast, dynamic braking typically involves the use of the motor as a generator during the braking process, allowing for energy regeneration rather than just applying a DC voltage. Friction braking relies on mechanical means to slow down an object, and reactive braking relates to using reactive power management techniques, which do not specifically involve applying DC to motor windings. Understanding these distinctions clarifies why electric braking is the correct terminology for this specific method.