Question

Assertion There is no current in the metals in the absence of electric field.
Reason Motion of free electrons are randomly.

• A. If both the assertion and reason are true and reason explains the assertion.
• B. If both the assertion and reason are true but reason does not explain the assertion.
• C. If assertion is true but reason is false.
• D. If assertion is false but reason is true.

Answer 1

Answer: (A)

It is clear that electrons move in all direction haphazardly in metals. When an electric field is applied, each free electron acquire a drift velocity. These is a let flow of charge, which constitute, current. In the absence, if electric field this is impossible, and hence, these is no current.