AIIMS 2014 Physics Current and Electric Fields MCQ Question
Assertion There is no current in the metals in the absence of electric field. Reason Motion of free electrons are randomly.
If both the assertion and reason are true and reason explains the assertion.
If both the assertion and reason are true but reason does not explain the assertion.
If assertion is true but reason false
If assertion is false but reason is true
Correct Answer
Detailed Explanation
The correct answer is A because both the assertion and reason are true, and the reason explains the assertion. In metals, the absence of an electric field means there is no systematic force acting on the free electrons, resulting in their random motion and consequently no net current. Thus, the random motion of free electrons directly supports the assertion that there is no current without an electric field.
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