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Mastering Physics: Homework 2 Google Chrome Secure https:// masteringphysics.com session PHY 202 FALL 2017 Homework 2 Problem 15.67 Problem 15.67 Two point charges lie on the x-axis: 0.20 uC at z 0.20 m and 0.11 AC at z 0.75 m Signed in as Chad Rich I Heb l Close Resources previous l 6 of 8 l next Part A Find the place(s) where the electric field is zero. Express your answer using two significant figures. If there is more than one answer, separate them by commas. Submit My Answers Give Up Continue Provide Feedbac 10:16 AM 1/30/2017

Explanation / Answer

here,

q1 = 0.2 * 10^-6 C is at x1 = 0.2 m

q2 = 0.11 * 10^-6 C is at x2 = 0.75 m

A)

let the electric feild at x is zero

E = K * q1 /( x - 0.2)^2 - k * q2 /( 0.75 - x)^2

0 = K * q1 /( x - 0.2)^2 - k * q2 /( 0.75 - x)^2

0 = 0.2 /( x - 0.2)^2 - 0.11 /( 0.75 - x)^2

solving for x

x = 0.52 m

the electric feild is zero at x = 0.52 m

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