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A particle of (e)/(m) ratio equal to 4 x...

A particle of `(e)/(m)` ratio equal to `4 xx 10^(5)` coul/kg is accelerated from rest through a potential difference of 20 volt . The speed of particle is :

A

4.0 m/s

B

4000 km/s

C

4000 cm/s

D

4000 m/s

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The correct Answer is:
D
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