Given below are two statements. One is labelled Assertion (A) and the other is labelled Reason (R).
Assertion: The electric bulbs glows immediately when switch is on.
Reason: The drift velocity of electrons in a metallic wire is very high
In light of the above statements, choose the correct answer from the options given below.

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If both the assertion and reason are true but the reason is not the correct explanation of assertion

If both the assertion and reason are false.

If the assertion is true but reason is false

If both the assertion and reason are true and reason is a true explanation of the assertion.

answer is C.

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Detailed Solution

In a conductor there are large number of free electrons. When we close the circuit, the electric field is established instantly with the speed of electromagnetic wave which cause electron drift at every portion of the circuit. Due to which the current is set up in the entire circuit instantly. The current which is set up does not wait for the electrons flow from one end of the conductor to the another end. It is due to this reason, the electric bulb glows immediately when switch is on

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