It is easier to confine electric current to definite paths (by the use of electric insulators) than to direct heat flow along definite routes using heat insulators. Why?

Explanation

The electrical resistivity of insulators (e.r., glass) differs from metals by a factor of the order of `10^(22)` The thermal conductivity of thermal insulators differs from thermal metals by a factor of the order of `10^(3)`. It is due to this reason, it is easier to send electric currents to definite paths by the use of insulators than to direct heat flow along definite routes using heat insulators.