Question

insulation difficulties of electricity​

Answer 1

$\pink \{Hey \: Mate!$

A perfect insulator does not exist because even insulators contain small numbers of mobile charges (charge carriers) which can carry current. In addition, all insulators become electrically conductive when a sufficiently large voltage is applied that the electric field tears electrons away from the atoms.

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Answer 2

$\huge \blue {hey \: {mate}}$

$\red{ \underline \bold {hope \: it \: helps \: u}}</p><p>$

Dirt, pollution, salt, and particularly water on the surface of a high voltage insulator can create a conductive path across it, causing leakage currents and flashovers. The flashover voltage can be reduced by more than 50% when the insulator is wet.