The potential difference between two large parallel plates is varied as v = at; a is a positive constant and t is time. An electron starts from rest at t = 0 from the plate which is at lower potential. If the distance between the plates is L, mass of electron m and charge on electron -e then find the velocity of the electron when it reaches the other plate.
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
V = 
Sol.
Figure shows two parallel plates electric field between plates E = V/d
⇒ E = 
force on electron = qE = 
,
So acceleration of e – = 
By acceleration = 
; (v = velocity)
= 
⇒ dv = 
dt
⇒ 
= 
⇒ v = 
Again, v = 
= 
...(1)
⇒ 
= 
⇒ L = 
∴ t = 
putting in eqn. (1)
v = 
= 
; v = 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems