Why is there sparking when an electric circuit is switched off?
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As you open the switch to turn off the light, you are pulling two conductors apart to break the circuit. As the conductors begin to separate, the high voltage (115 or 230V)can cause breakdown of some of the air molecules in the gap and a small amount of current flows through the ionized air and you see a “spark’. A soon as the gap in the conductors becomes wider the process stops because the electric field becomes weaker and no longer ionizes the air, no current, no spark
Hope it helps
As you open the switch to turn off the light, you are pulling two conductors apart to break the circuit. As the conductors begin to separate, the high voltage (115 or 230V)can cause breakdown of some of the air molecules in the gap and a small amount of current flows through the ionized air and you see a “spark’. A soon as the gap in the conductors becomes wider the process stops because the electric field becomes weaker and no longer ionizes the air, no current, no spark
Hope it helps
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