An electric dipole of moment 3×10−8 coul-m is placed at a distance of 10 cm from a +10μC point charge with the charge on its axis. Then magnitude of force experienced by the dipole is
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a
1.64 N
b
5.4 N
c
8.32 N
d
0.85 N
answer is B.
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Detailed Solution
F = Force experienced by the dipole= Force experienced by the charge=(14π∈0×2pr3)Q=9×109×2×3×10−8(0.1)3×(10×10−6)N⇒F=5.4 N