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  • An electron moving at a speed of 10 km/sec in a straight line enters a uniform electric field where it experiences a constant acceleration of <img alt="\mathrm{2 km / sec^2}" src="https://entrancec

An electron moving at a speed of 10 km/sec in a straight line enters a uniform electric field where it experiences a constant acceleration of \mathrm{2 km / sec^2} in a direction opposite to its motion. It will come back to initial point (where it entered the field) after a time:

Option: 1

5 Sec


Option: 2

10 Sec


Option: 3

6 Sec


Option: 4

4 Sec


Answers (1)

best_answer

\mathrm{ \Rightarrow V=u+a t \Rightarrow 0=10-2 t_1 \Rightarrow t_1=5 \mathrm{sec} \\ }

\mathrm{ \Rightarrow 10=0+2 t_2 \Rightarrow t_2=5 \mathrm{sec} \\ }

\mathrm{ \Rightarrow t_1+t_2=10 \mathrm{sec} }
 

Posted by

Ajit Kumar Dubey

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