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Two charges - q and +q are located at po...

Two charges - q and +q are located at points (0, 0, - a) and (0,0, a), respectively.
Obtain the dependence of potential on the distance r of a point from the origin when `r/a gt gt 1`.

Text Solution

Verified by Experts

The given charges behave as an electric dipole and the dipole length is 2a, hence dipole moment `p = q.2a`.
If `r/a gt gt 1 or r gt gt a `, then electric potential due to the dipole is inversely proportional to `r^2` i.e., `1/r^2`.
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Knowledge Check

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    A
    `(qa)/(4piepsilon_(0)z^(2))`
    B
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  • Two point charges q and –q are at positions (0,0,d) and (0,0, –d) respectively . What is the electric field at (a,0,0 ) ?

    A
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    B
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    C
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    D
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    B
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    C
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    D
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