a) Find the electric potential difference ΔVe required to stop an electron (called a "stopping potential") moving with an initial speed of 2.00 107 m/s.
kV

(b) Would a proton traveling at the same speed require a greater or lesser magnitude of electric potential difference?
greater
lesser
equal

Explain.

(c) Find a symbolic expression for the ratio of the proton stopping potential and the electron stopping potential, ΔVp/ΔVe. (Use the following as necessary: mp for the mass of proton and me for the mass of electron.)
ΔVp
ΔVe
=

Question

a) Find the electric potential difference ΔVe required to stop an electron (called a "stopping potential") moving with an initial speed of 2.00  107 m/s.
  kV

(b) Would a proton traveling at the same speed require a greater or lesser magnitude of electric potential difference?
greater
lesser    
equal


Explain. 
 
(c) Find a symbolic expression for the ratio of the proton stopping potential and the electron stopping potential, ΔVp/ΔVe. (Use the following as necessary: mp for the mass of proton and me for the mass of electron.)
ΔVp
ΔVe
 =