Pick the odd one out, considering arc quenching methods of a circuit breaker.

Methods for arc quenching of a circuit breaker

Current Zero Method:

• The Current Zero Method is different because it relies on the natural current zero crossing in AC circuits.
• In AC systems, current passes through zero twice per cycle. Circuit breakers designed for AC use this point to interrupt the arc with minimal energy.
• Unlike the other three methods, it does not involve modifying the arc physically but rather utilizing the natural characteristics of AC current.

Cooling the Arc Method:

• The arc is cooled using air, oil, or gas, reducing its temperature and increasing resistance, leading to extinction.

Lengthening the Arc Method:

• The arc path is extended to increase resistance, making it more difficult for current to sustain.
   

Splitting the Arc Method:

• The arc is broken into multiple small arcs using arc splitters, increasing resistance and aiding in extinction.

"Current Zero Method" is the odd one out, as it is not a physical arc quenching method but rather a strategy based on AC circuit behavior.