Assertion : Consider two identical charges placed distance 2d apart, along x- axis. equilibrium of a

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1. Electric Charges and Fields

easy

Assertion : Consider two identical charges placed distance $2d$ apart, along $x-$ axis. The equilibrium of a positive test charge placed at the point $O$ midway between them is stable for displacements along the $x-$ axis.

Reason: Force on test charge is zero

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

If Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

(AIIMS-2013)

Solution

If $+ve$ charge is displaced along $x-$ axis, then net force will always act in a direction opposite to that of displacement and the test charge will always come back to its original position.

Standard 12

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