Question

why the sparking generates in an engine? and how we can control on it?​

Answer 1

The ignition coil's high voltage output is connected to the rotor that sits on top of the distributor shaft. ... The high voltage from the coil's secondary (typically 20,000 to 50,000 volts) causes a spark to form across the gap of the spark plug that in turn ignites the compressed air-fuel mixture within the engine.