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The drift speed of electrons in a conductor is estimated to be only a few mm $s^{-1}$, But on closing a circuit, how current is established almost instantly in an electric circuit? |
Electrons are accelerated towards the positive end of the conductor while their velocity increases towards the other end Drift velocity of electrons increases Electric field is established throughout the circuit with the speed of an electromagnetic wave, causing at every point local electron drift causing current. The electrons drift towards the negative end |
Electric field is established throughout the circuit with the speed of an electromagnetic wave, causing at every point local electron drift causing current. |
The correct answer is Option (3) → Electric field is established throughout the circuit with the speed of an electromagnetic wave, causing at every point local electron drift causing current. |
