Immediately after being turned off, ___ braking of a motor involves the reconnection of the motor to act as a generator.

The concept of dynamic braking in motor systems refers to a method where the motor is allowed to operate as a generator when it is switched off. In this process, the inertia of the motor's rotor continues to turn, generating electricity. This generated electric power is then dissipated typically through a resistor or returned to the supply system, leading to a quick reduction in the motor's speed.

When a motor is immediately disconnected from the power supply, during dynamic braking, the motor terminals remain connected to the load, allowing the energy stored in the rotor's motion to be converted back into electrical energy. This method is particularly effective for reducing speed quickly without mechanical brakes, which can wear out.

This method differs from other braking techniques. For instance, friction braking utilizes physical brakes, which do not involve the motor acting as a generator, while electric braking generally refers to methods involving the use of electrical controls without the regenerative aspect. Reactor braking relies on the use of inductive elements to slow down the motor.

Thus, dynamic braking is specifically characterized by the motor functioning as a generator right after being turned off, making it the correct choice in this context.