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the electric field is given by vec(E)=(...

the electric field is given by `vec(E)=(vec(F))/(q_(0))` here the test charge `q_(0)` should be (a) Infinitesimally small and positive
(b) Infintestimally small and negative

A

only a

B

only b

C

a (or) b

D

neither a and b

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