Answer:
Explanation:
in the electric field electron will face a force which will create an acceleration
( here - ve ) as follows
Force on electron
= charge on electron x electric field = Q X E
acceleration= Force / mass = Q E / m
mass of electron = 9.1 x 10⁻³¹
acceleration a = [tex]\frac{1.6\times10^{-19}\times 9900}{1.67\times10^{-27}}[/tex]
= 17.4 x 10¹⁴ ms⁻² .
Now initial velocity u = 5 x 10⁶ m/s
Final velocity v = 0
acceleration a = 17.4 x 10¹⁴ ms⁻²
distance of travel = s
v² = u² - 2as
0 = (5 x 10⁶)² - 2 x 17.4 x 10¹⁴ s
s = 7.18 mm
2 ) v = u - at
0 = 5 x 10⁶ - 17.4 x 10¹⁴ t
t = .287 x 10⁻⁸ s
Total time elapsed = 2 x .287 x 10⁻⁸
= .57 x 10⁻⁸ s .
