Question

Automobile ignition failure occurs in damp weather ,explain why?

Answer 1

$\textbf{Hey there}$!!

$\textbf{Answer}$:

The insulating porcelain of the spark plugs accumulates a film of dirt. The surface dirt is hygroscopic and picks up moisture from the air.


Therefore, in humid weather, the insulating porcelain of the plugs becomes quasi - conductor. This allows an appreciable proportion of the spark to leak across the surface of the plug instead of discharging across the gap.

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@karangrover12.