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Two point charges q(A)=3muC and q(B)=-3m...

Two point charges `q_(A)=3muC` and `q_(B)=-3muC` are located 0.2 m apart in vacuum.
a. What is the electric field at the mid point O of the line AB joining the two charges?
b. If a negative test charge of magnitude `1.5xx10^(-9)C` is placed at this point, what is the force experienced by the test charge?

Text Solution

Verified by Experts

Given `q_(A) = 3xx10 ^(-6) C, q_(B )=-3xx10^(-6)C,`
`r=0.20 m`
Net force on `-1.5 xx10 ^(-9) C ` placed at .0.
`F=q_(0) E_(0)`
`i.e., F=-1.5xx10^(-9) xx5.4xx10 ^(6) N `
` = 8.10 xx10 ^(-3) N` in the direction along OA .
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