Question

It is known that the drift velocity of electrons is only a few mm/s for a current of a few amperes then how is it possible that a current is established almost instantanously when a circuit is closed? Example a bulb glows as soon as the connection is switched onexplain

Answer 1

Answer:

bulb glows as soon as the connection is switched because the current flows fast and through in seconds it reaches it destination

Answer 2

This is because of the drift velocity of each of the electron.

Explanation:

• Also the drift velocity changes with increase in the potential difference. As a result of this when the potential difference is high specially in the case of a bulb where it works in 220 volt there is very high drift velocity which is produced.
• In addition to this the area is also high of the wire which results in significant increase in the drift velocity

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