Macmillan Learning
What is the change in potential energy $U_{electric,b} - U_{electric,a}$ of
a +5.00 nC test charge as it is moved from point a at
x = -30.0 cm to point b at x = 50.0 cm?
The same test charge is released from rest at point a.
What is its kinetic energy $K_b$ when it passes through point b?
$U_{electric,b} - U_{electric,a} =$
J
$K_b =$
J
If a negative charge instead of a positive charge were used in this problem, qualitatively how would your answers change?
(Select all that apply.)
electric potential energy changes sign
kinetic energy magnitude increases
test charge never passes through point b
kinetic energy magnitude decreases
electric potential energy magnitude increases
kinetic energy changes sign
electric potential energy magnitude decreases
