Please help me solve this problem. MasteringPhysics: Ch 20: Problems with electr

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Please help me solve this problem.

MasteringPhysics: Ch 20: Problems with electric potential and fields Google Chrome Secure https://session.masteringphysics.com/rmyct/itemView?assignmentProblemlDz92944105 Ch 20: Problems with electric potential and fields Lesson Check 20.15 1 of 15 Constants Part A k-8.99 x 10, N·m2/C. At what distance does the electric field produced by a charge of-11 have a magnitude equal to S5 x 101 N/C Express your answer to two significant figures and include the appropriate units. Tillie Units Submit incorrect; Try Again Provide Feedback Next > 9:11 PM 3A6/2018

Explanation / Answer

Given,

E = 8.5 x 10^4 N/C ; q = -11 x 10^-6 C

We know that the electric field of a point charge is given by:

E = kq/r^2

r = sqrt (kq/E)

r = sqrt (8.99 x 10^9 x 11 x 10^-6/(8.5 x 10^4)) = 1.079 m

Hence, r = 1.079 m ( =1.08 m)

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