A particle of mass $$2g$$ and charge $$1$$ μC is held at rest on a frictionless horizontal surface at a distance of $$1m$$ from a fixed charge $$1mC$$. If the particle is released, it will be repelled. The speed of the particle when it is at a distance of $$10m$$ from the fixed charge is :

Question

A particle of mass $$2g$$ and charge $$1$$ μC is held at rest on a frictionless horizontal surface at a distance of $$1m$$ from a fixed charge $$1mC$$. If the particle is released, it will be repelled. The speed of the particle when it is at a distance of $$10m$$ from the fixed charge is :

Infinity Learn · Accepted Answer

Gain in $$KE$$$$=$$ Loss in electrostatic potential energy⇒$$12mv2=q1q24$$πε$$01r1-1r2$$ ⇒$$12$$ x $$2$$ x $$10-3$$ x $$v2=9$$ x $$109$$ x $$10-3$$ x $$10-611-110$$ ⇒$$v2=8100$$ ⇒$$v=90$$ $$m/s$$

A particle of mass 2g and charge $1 μC$ is held at rest on a frictionless horizontal surface at a distance of 1m from a fixed charge 1mC. If the particle is released, it will be repelled. The speed of the particle when it is at a distance of 10m from the fixed charge is :

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A particle of mass 2g and charge 1 μC is held at rest on a frictionless horizontal surface at a distance of 1m from a fixed charge 1mC. If the particle is released, it will be repelled. The speed of the particle when it is at a distance of 10m from the fixed charge is :

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A particle of mass 2g and charge $1 μC$ is held at rest on a frictionless horizontal surface at a distance of 1m from a fixed charge 1mC. If the particle is released, it will be repelled. The speed of the particle when it is at a distance of 10m from the fixed charge is :