The Laplace transform of $$\,\left( {{t^2} - 2t} \right)\,u\left( {t - 1} \right)$$ is ______________.

The $$MOSFET$$ switch in its on - state may be considered equivalent to

The uncontrolled electronic switch employed in power electronic converters is

In a commutation circuit employed to turn off an $$SCR$$, Satisfactory turn-off is obtained when.