Question

An electron enters uniform electric field maintained by parallel plates and of value $EV{{m}^{-1}}$ with a velocity $v\text{ }m{{s}^{-1}},$ the plates are separated by a distance $d$ metre, then acceleration of the electron in the field is:

• A. $\frac{Ee}{m}$
• B. $\frac{-Ee}{m}$
• C. $\frac{Ed}{md}$
• D. $Ee\frac{d}{m}$

Answer 1

Answer: (A)

$\frac{Ee}{m}$

Answer 2

$F=eE$
Therefore, acceleration in electron due to force F
$a=\frac{F}{m}=\frac{eE}{m}$