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Question
Assertion :Current in wire-1 is in the direction as shown in figure.The bottom wire is fixed.To keep the upper wire stationary current in it should be in opposite direction. Reason: Under the above condition,equilibrium of upper wire is stable.
Assertion :Current in wire-1 is in the direction as shown in figure.The bottom wire is fixed.To keep the upper wire stationary current in it should be in opposite direction. Reason: Under the above condition,equilibrium of upper wire is stable.
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Solution
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Using Fleming's left hand rule (Or one can use vectors), we need to have forces in opposite directions to cancel out each other. Therefore, assertion is true. If we disturb the above wire, the wire will vibrate about its mean position due to the restoring force, which implies it is in stable equilibrium. And reason clearly isn't the correct explanation for the assertion.
Using Fleming's left hand rule (Or one can use vectors), we need to have forces in opposite directions to cancel out each other. Therefore, assertion is true. If we disturb the above wire, the wire will vibrate about its mean position due to the restoring force, which implies it is in stable equilibrium. And reason clearly isn't the correct explanation for the assertion.
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