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Q.

The ratio of magnitudes of Electric field strength at A(2,0,0)  and at B  (2,23,0)  due to a short dipole having dipole moment p→=i^+3j^ , kept at origin is

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a

1

b

87

c

27

d

78

answer is C.

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Detailed Solution

Eax=k2pr3 Eeq=kpr3 here for point (2,0,0) ⇒r=2 EA=E1+E2=2k(1)23i^+k(3)23j^ EA=(k4)2+(3k8)2=7k8 EB=k16So EAEB=27
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