Posted by chandankumar on .
if electron are caused to fall through a potential difference of 100000 voltage , determine their final speed if they were initially at rest.
e*100,000 is the kinetic energy.
e is the electron charge,1.6*10^-19 C
Set 100,000*e equal to (1/2)mV^2 and solve for V
m is the electron mass.
therefore, workdone , W=q×p.d.
W=1.6×10^-19 × 100000
since work done = force × displacement