MasteringPhysics: CH2 HW ure https//sessin.masteringphysics.com/myct/itemview?as

Question

MasteringPhysics: CH2 HW ure https//sessin.masteringphysics.com/myct/itemview?assignmentProblemID-86221443 CH 25 HW Problem 25.39 Secu previous 13 of 18 / next Pe Problem 25.39 Part A At what point or points on the z-axis is the electric potential zero? Express your answer separated by a comma ·S | 5.10 I A11.5 nC charge is at z = 0cm1 and a-1.0nC charge is at z #3 answer using two significant figures. If there is more than one answer, give eackh ? em zo = 13.5 crn lem Submit Answers Give Up blem Incorrect; Try Again; 6 attempts remaining blem blem Provide Feedback oblem roblem SS 25.2 roblem

Explanation / Answer

here,

q1 = 11.5 * 10^-9 C is at x1 = 0 cm

q2 = - 1 * 10^-9 C is at x2 = 3 cm

A)

let the electric potential is zero at x3

the net potential at x3 , V = k * q1 /(x3) + k * q2 /( x2 - x3)

0 = 11.5 /x3 - 1 /( 3 - x3)

solving for x3

x3 = 2.76 cm

the electric potential is zero at x3 = 2.76 cm

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