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Q.

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
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