Electric braking is a method of braking in which ___ voltage is applied to the stationary windings of a motor after the normal power has been disconnected.

Electric braking is a method employed to bring a motor to a stop through the application of a voltage to its stationary windings after the normal power supply has been shut off. When a direct current (DC) voltage is applied, it creates a counter magnetic field within the motor. This counter magnetic field opposes the rotation of the rotor, effectively slowing down or stopping the motor more quickly than it would under normal conditions.

Using DC for electric braking is particularly effective because it allows for controlled deceleration and can be easily adjusted by changing the voltage or current applied to the windings, thus providing a more efficient and reliable braking mechanism. The other options would not provide the same level of control or effectiveness in braking as the application of DC voltage does.