mustafa.jawba FlipltPhysics macmillan learning Physics 4B: EM and Heat, F2017 Ca

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mustafa.jawba FlipltPhysics macmillan learning Physics 4B: EM and Heat, F2017 California State University, Fresno Unit 7: Prelecture / Checkpoint/Homework/ Homework: HW7 Of CH21 Deadline: 100% until Monday, October 9 at 11:59 PM Tipler6 21.P.042. 1) A point charge of 5 pC is located at x =-3.0 cm, and a second point charge of-8 C is located at x-+4.0 cm. where should a third charge of +6.0 C be placed so that the electric field at x = 0 is zero? 2.126 You currently have 1 submissions for this question. Only 10 submission are allowed Submit You can make 9 more submissions for this question.

Explanation / Answer

Here ,

q1 = 5 uC

x1 = -3 cm

q2 = - 8 uC

x2 = 4 cm

NOw, for electric field at x = 0 to be zero

6 uC shall be placed at x cm

k * 5/3^2 + k * 8/4^2 - k * 6/x^2 = 0

5/3^2 + 8/4^2 - 6/x^2 = 0

x = 2.38 cm

the charge 6 uC must be placed at x = 2.38 cm

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