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At large distance r, how does a dipole's electric field fall off?
AAs 1/r
BAs 1/r2
CAs 1/r3
DAs 1/r4
Answer & Solution
Correct answer: C. As 1/r3
The two opposite fields nearly cancel, leaving a field that decreases as 1/r3, faster than a point charge's 1/r2.
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