NEET Physics Question - Current Electricity - Relation between Current and Drift Velocity

Assertion (A): The electric bulb glows immediately when switch is on.

Reason (R): The drift velocity of electrons in a metallic wire is very high (near speed of light).

(1) Both (A) & (R) are true and the (R) is the correct explanation of the (A)

(2) Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(3) (A) is true but (R) is false

(4) Both (A) and (R) are false

Solution:

Assertion (A) is true because the electric field propagates very quickly, causing electrons to move almost instantly. Reason (R) is false; the drift velocity of electrons is very slow, typically \( 10^{-4} \text{ m/s} \) to \( 10^{-5} \text{ m/s} \).

Rankers Physics

Electric Bulb Glows

Solution:

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