#### Question

**(a)** Consider an arbitrary electrostatic field configuration. A small test charge is placed at a null point (i.e., where **E **= 0) of the configuration. Show that the equilibrium of the test charge is necessarily unstable.

**(b)** Verify this result for the simple configuration of two charges of the same magnitude and sign placed a certain distance apart.

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#### Reference Material

Solution for question: Show that the Equilibrium of the Test Charge is Necessarily Unstable concept: Charging by Induction. For the courses CBSE (Arts), CBSE (Commerce), CBSE (Science)