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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. Also analyse the situation when test charge is placed between two +ve charges and two -ve charges.I which configuration the test charge will be in stable equillibrium and why?


 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.
Also analyse the situation when test charge is placed between two +ve charges and two -ve charges.I which configuration the test charge will be in stable equillibrium and why?


Grade:upto college level

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