Question

Can someone please give me the formulas to solve these questions.

An election is accelerated by a voltage of 2500V between plates a and b. What’s the electrons change in energy when reaching plate b if it starts from rest. And what’s the electrons speed when reaching plate b ?

Answer 1

voltage is energy per unit charge.

Energy gained = 2500 * charge on electron
= 2500 * 1.6*10^-19 Joules

(1/2) m v^2 = 2500 * 1.6*10^-19 Joules
where m = 9.1 * 10^-31 kg

Answer 2

Thank you so much :)