An electron starts from rest and falls through a potential rise of 100V. What is its final speed?​

The final speed of electron=

Explanation:

We are given that

Initial velocity, u=0

Potential, V=100 V

We have to find the final speed.

Mass of electron,

Charge on electron, q=

We know that

Using the formula

Hence, the final speed of electron=

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beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge