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What is the magnitude of a point charge ...

What is the magnitude of a point charge due to which the electric field 30 cm away has the magnitude `2 N//C [1//4 pi epsi_(0) = 9 xx 10^(9) N - m^(2)//C^(2)]`

A

`2xx10^(-11)C`

B

`3xx10^(-11)C`

C

`5xx10^(-11)C`

D

`9xx10^(-11)C`

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The correct Answer is:
A
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