The mass of an electron is m, charge is e and it is accelerated from rest through a potential difference of y volts. The velocity acquired by electron will be :

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eVm

2eVm

zero

answer is C.

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Detailed Solution

when an electron of charge e and mass m is accelerated with a potential difference of V volts KE. = eV⇒12mv2=eV or v2=2eVm⇒v=2eVm

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