Question

An electron is accelerated through a potential difference v. Write the expression for its final speed, if it was initially at rest

Answer 1

ANSWER :

Work done = e×V (e - charge on electron, V - potential difference)

Since this work is stored in the form of Kinetic energy ,

(0.5)mv² = e×V

Therefore v = [(2×e×V)÷m]^½

Answer 2

v={(2×e×v)÷m}^1/2

is the answer