| ASSERTION: There is no current in the metals in the absence of electric field. |
| REASON: Motion of free electron is randomly. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
It is clear that electrons move in all directions haphazardly in metals, when an electric field is applied. Each free electron acquires a drift velcity. There is a net flow of charge, which constitute current. In the absence of electric field this is impossible and hence, there is no current.
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