Two positive point charges +4.00 ?C and +2.00 ?C are placed at the opposite corn

Question

Two positive point charges +4.00 ?C and +2.00 ?C are placed at the opposite corners of a rectangle as shown in the figure. (k = 1/4? ?0= 8.99 × 109 N · m2/C2)

(a) What is the potential at point A (relative to infinity) due to these charges?

(b) What is the potential at point B (relative to infinity) due to these charges?

session.masteringphysics.com EP2-Sec54-Sp16 Help | Close HW3 Ch23 Problem 23.01 Resources « previous | 1 of 10 | next >» Part A Two positive point charges +4.00 C and +2.00 C are placed at the opposite corners of a rectangle as shown in the figure. (k = 1/4 0= 8.99 × 109 N·m2/C2) +4.00 uC 0.400 m +2.00 C 0.800 m (a) What is the potential at point A (relative to infinity) due to these charges? Submit My Answers Give Up Part B (b) What is the potential at point B (relative to infinity) due to these charges? Submit My Answers Give Up

Explanation / Answer

potential is a vector quantity

V = kq1/r1 + kq2/r2 + kq3/r3 + ......

part a )

V = kq/r

at point A

V = k*2*10^-6 / 0.400 + k * 4 x 10^-6 / 0.800

V = 89,900 V

at point B

V = k*2*10^-6 /0.800 + k*4*10^-6/0.400

V = 112375 V

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