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Two electric charges 9 mu c and -3 mu c ...

Two electric charges `9 mu` c and `-3 mu` c are placed `0.16` m apart in air. There will be a point `p` at which electric potential is zero on the line joining the two charges and is between them.The distance of `p` from "9 mu c is .....

A

0.14 m

B

0.12 m

C

0.08 m

D

0.06 m

Text Solution

Verified by Experts

Electric Potential at point `P, V = V_(1) + V_(2) or V_(1) + V_(2) = 0`
`V_(1) = -V_(2)`
`rArr 1/4 pi epsilon_(0) q_(1)/r_(1) = -1/4 pi epsilon_(0) q_(2)/r_(2)`
`9/x = -(-3)/(0.16 - x)`
`3(0.16 - x) = x`
`rArr 0.48 - 3x = x `
4x = 0.48
`:. x = 0.12 m`
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