How is the voltage of the used spark plug to fire when compared to a new spark plug?

How is the voltage of the used spark plug to fire when compared to a new spark plug? Correct Answer High voltage

Used spark plugs may require a fairly higher voltage to fire than the new plugs because of the increase in the gap and rounding off of the center electrode. In a given engine the highest ignition voltage is required during part throttle acceleration.

Related Questions

Which of the following spark plug increases the resistance to increase the voltage required to jump across the spark plug gap?
The voltage in a spark plug at the time of spark is