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For Dipole{:[ vec(E)=(1)/(4piepsilon_(0))*(r*2p)/((r^(2)-a^(2))^(2))= vec(E)_(+)+ vec(E)_(-)],["and for "r>>a],[ vec(E)=(1)/(4piepsilon_(0))*(2p)/(r^(3)) hat(p)quad ... See the full answer