In Textual Example 1, the electron drift speed is estimated to be only a few `mm s^(-1)` for currents in the range of a few amperes? How then is curre

Question

In Textual Example 1, the electron drift speed is estimated to be only a few `mm s^(-1)` for currents in the range of a few amperes? How then is curre

In Textual Example 1, the electron drift speed is estimated to be only a few `mm s^(-1)` for currents in the range of a few amperes? How then is current established almost the instant a circuit is closed?

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Electric field is established throughout the circuit, almost instantly (with the speed of light) (causing at every point a local electron drift. Establishment of a current does not have to wait for electrons from one end of the conductor travelling to the other end. However it does take a little while for the current to reach its steady value.