A uniform electric field of magnitude points in the direction from to

PHYSICS · Subjective · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance

Problem

A uniform electric field of magnitude

250\,\text{N/C}

points in the

+x

direction from

x=0

x=0.030\,\text{m}

. From

x=0.030\,\text{m}

x=0.060\,\text{m}

, the field magnitude is

120\,\text{N/C}

and points in the

-x

direction. A singly ionized sodium ion (charge

+e

, mass

3.8\times10^{-26}\,\text{kg}

) is released from rest at

x=0

. Calculate its speed when it reaches

x=0.060\,\text{m}

. (

e = 1.60\times10^{-19}\,\text{C}

)