Using multiple contacts and rapid opening times helps __________ the arc.

Using multiple contacts and rapid opening times helps cool the arc. When electrical contacts open quickly during the operation of circuit breakers or switches, the distance between the contacts increases rapidly, which helps to quench the arc that forms due to the current. The arc heats up significantly and can cause damage to the circuit components, so cooling the arc effectively reduces the risk of equipment failure and ensures safety in electrical systems.

By employing multiple contacts, the total surface area for interrupting the current is increased, allowing for more effective dissipation of heat generated by the arc. This mechanism aids in maintaining the integrity of the electrical system and minimizes potential hazards associated with high temperatures from prolonged arcing.