T-Mobile Wi-Fi 9:58 AM courses1.webwork.maa.org Previous Problem Problem List Ne

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T-Mobile Wi-Fi 9:58 AM courses1.webwork.maa.org Previous Problem Problem List Next Problem (1 point) Q2 B 43 Three point charges Q14.66 nC 021.06 nC, and Qs-2.38 nC are shown in the figure. The distances between the charges, as shown in the figure, are: d 2.25 cm d-5.38 cm, d1.89 cm, ds-4.62 cm Assume that the positive direction is the +x direction. (A) Find the electric field at 'A. (B) Find the electric field at "B. Note: You can earn partial credit on this problem. You are in the Reduced Scoring Period: Al additional work done counts 80% of the original. Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Email instructor Page generated at 07/27/2018 at 09:57am CDT WeBWork o 1996-20171 theme: math4 / ww.version WeBWork-2.13 pg version PG-2.13 The WeBWork Project

Explanation / Answer

here,

Q1 = 4.66 nC = 4.66 * 10^-9 C

Q2 = - 1.06 nC = - 1.06 * 10^-9 C

Q3 = 2.38 nC = 2.38 * 10^-6 C

A)

the electric feild at A , Ea = k * Q1 /d1^2 + K * q2 /d2^2 - K * Q3 /( d2+ d3 + d4)^2

Ea = 9 * 10^9 * 10^-9 * (4.66 /0.0255^2 + 1.06 /0.0528^2 - 2.38 /(0.0538 + 0.0189 + 0.0462)^2 )

Ea = 66405 i N/C

B)

the electric feild at B , Eb = K*Q1 /(d1 + d2 + d3)^2 - K * q2 /(d3^2) - K * Q3 /( d4^2))

Eb = 9 * 10^9 * 10^-9 * ( 4.66/(0.0225 + 0.0538 + 0.0189)^2 - 1.06/0.0189^2 - 2.38/0.0462^2) N/C

Eb = - 32114.8 i N/C

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