Ch. 17 Problem 17.43 30 of 33 Constants Part A Three negative point charges lie

Question

Ch. 17 Problem 17.43 30 of 33 Constants Part A Three negative point charges lie along a line as shown in (Figure 1). Point P lies 6.00 cm from the 2 charge measured perpendicular to the line connecting the three charges. Assume that q 5.00 C and Q2 -1.60 uC Find the magnitude of the electric field this combination of charges produces at poin Express your answer in newtons per coulomb to three significant figures Figure E-1-9.40 . 106 N/C 1 of 1 91 Submit Previous Answers Request Answer 8.00 em 6,.00cm X Incorrect Try Again; 3 attempts remaining 1 92 8.00 cml Part B gi Find the direction of the electric field this combination of charges produces at point AP

Explanation / Answer

x= arctan (8/6)= 53.13

Net electric field due to combination of two q1 at P is given only by the x component of their individual fields , as vertical components are equal and opposite hence they cancels each other. So net electric field at P is given by

E= 2*k q1/r^2* cos x + k q2/d^2

= 9*10^9* 2* 5*10^-6* cos 53.13 / (0.08^2+ 0.06^2) + 9*10^9* 1.6*10^-6/0.06^2

=9.4 *10^6 N/C

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Directed to the west i.e. towards q2.

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Comment in case any doubt.. good luck

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