Calculate the speed of an electron that has fallen through a potential difference of
(a) 125 volts and
(b) 125 megavolts.

Explanation:

We need to find the speed of an electron that has fallen through a potential difference of  125 volts. It can be calculated using the De-broglie hypothesis as :

(a) V = 125 volts

Where

v = speed of electron

V is potential difference

v = 6629935.44 m/s

(b) V = 125 megavolts

Hence, this is the required solution.