Which braking method provides an electrical means to stop the motor?

Dynamic braking is a method used to stop an electric motor by utilizing the motor's own characteristics as a generator during the braking process. When the motor is turned off or the power supply is interrupted, it continues to spin and convert its kinetic energy into electrical energy. This generated electricity is then dissipated as heat in a braking resistor or returned back to the power supply system, effectively slowing the motor down.

This method is particularly useful in applications where rapid stopping is necessary, such as in conveyors or cranes, where dynamic braking can be employed to stop the load quickly and safely. Dynamic braking allows for an efficient use of the energy generated during deceleration, rather than wasting it as heat or relying on mechanical means.

Other braking methods like friction and mechanical braking primarily involve physical components that come into contact to create resistance and slow down the motor, but they do not utilize electrical means to achieve this effect. Regenerative braking, while also involving the conversion of kinetic energy into electrical energy, typically refer to a system where energy is returned to the power system and is more aligned with electric vehicles or systems designed for energy recovery. Thus, dynamic braking is specific to stopping the motor using the electrical characteristics of the motor itself, making it the correct answer.