e Fle Edit View History Bookmarks People Window Help A HW 2 SPRING 17 O webassig

Question

e Fle Edit View History Bookmarks People Window Help A HW 2 SPRING 17 O webassign netweb/student/Assignment Responsesvast?dep 15687454 -5 points Sercp10 PDOs A point charge +42.0 PC moves from A to B separated by a distance 0.170 m in the presence of an external electric field E of magnitude 250 NWC directed toward the right as in the following figure. (a) Find the electric force exerted on the charge (b) Find the work done by the electric force. (c) Find the change in the electric potential energy of the charge. (d Find the potential dinherence between Va. VA Need Help? command option rol Toption command

Explanation / Answer

(A) Fe = q E

= (42 x 10^-6 C ) ( 250 N/C)

= 0.0105 N

to the right

(b) Work done = F.d = 0.0105 x 0.170 = 1.785 x 10^-3 J

(c) change in PE = - W = - 1.785 x 10^-3 J

(d) deltaV = - E . d

= - 250 x 0.170

= - 42.5 Volt

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