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Two point charges q and -q are separated...

Two point charges q and -q are separated by a distance 2a. Evaluate the flux of the electric field strength vector across a circle of radius R.

A

`(q)/(2epsilon_(0)){1-(a)/(sqrt(a^(2)+r^(2)))}`

B

`(q)/(epsilon_(0)){1-(a)/(sqrt(a^(2)+r^(2)))}`

C

`(2q)/(epsilon_(0)){1-(a)/(sqrt(a^(2)+r^(2)))}`

D

zero

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