Assertion: Though large number of free electron are present in the metal, yet there is no current in the absent of electric field.
Reason: In the absence of electric field, electrons move randomly in all directions

Options

A. If both assertion and Reason are true and the Reason is the correct explanation of the assertion.
B. If both assertion and Reason are true but the reason is not the correct explanation of the assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

A

Explanation

Free electrons present in the metal are moving randamly in all directions, in the absence of electric field. Hence, the average velocity of electron is zero, because of if the current does not flow in the metal in the absence of electric field.