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An electron is accelerated through a potential difference of 2oo volts. If e I m for electron be 1.6x1011 coulomb/kg, the velocity acquired by the electron will be

a
8 x106 m/s
b
8 x 105 m/s
c
4.9 x 106 m/s
d
5.9 x 95 m/s

detailed solution

Correct option is A

we know that V=2V(e/m) v=2×200×1.6×1011 =8×106m/s

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