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A particle of mass $2g$ and a charge $1 \mu C$ is held at rest on a frictionless horizontal surface at a distance of $1m$ from a fixed charge of $1 \mu C$. When released the particle gets repelled. The speed of the particle when it is at a distance of $10m$ from the fixed charge is

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$(B) 90 ms^{-1}$
Hence B is the correct answer.
answered Jun 13, 2014 by meena.p
 
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