electron drift speed is estimated to be only few mm/s for currents in range of few amperes How then is - Physics - Current Electricity

Question

electron drift speed is estimated to be only few mm/s for currents
in range of few amperes How then is current established almost the
instant a circuit is closed?

Akansha Tyagi · Accepted Answer

Since current is defined as the rate
of flow of charge so there are many electrons in the circuit
,that's why there flows current in whole circuit

electron drift speed is estimated to be only few mm/s for currents in range of few amperes.How then is current established almost the instant a circuit is closed?