Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • An electron of mass , charge <img alt="\mathrm{e}" src="https://entrancecorner.oncodecogs.com/gif.late

An electron of mass \mathrm{m}, charge \mathrm{e} falls through \mathrm{a} distance h meter in a uniform electric field \mathrm{E}. Then time of fall?

Option: 1

 \mathrm{t=\sqrt{\frac{2 h m}{e E}}}


Option: 2

\mathrm{ t=\frac{2 h m}{e E} }


Option: 3

\mathrm{t=\sqrt{\frac{2 e E}{h m}} }


Option: 4

\mathrm{t=\frac{2 e E}{\mathrm{hm}}}


Answers (1)

best_answer

use newtons equation of motion -

\mathrm{s=u t+\frac{1}{2}at^{t}} 


\mathrm{s=0+\frac{1}{2} \frac{e E}{m} \cdot t^2}                          \mathrm{e E=m a }


\mathrm{s=\frac{e E}{2 m} t^2 }


\mathrm{t^2=\frac{h 2 m}{e E} }

t=\sqrt{\frac{2hm}{eE}}
 
 

Posted by

jitender.kumar

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

NTA Exam 2025 Live: UGC NET admit card out for all exams; JEE Main session 1 hall ticket soon
anam-khan

SFI protests across Tamil Nadu universities against UGC draft regulations on faculty recruitment
anam-khan

How to get top rank in JEE Main 2025? Last 10-day study plan

Latest Question