Three charged particles are at the corners of an equilateral triangle as shown i

Question

Three charged particles are at the corners of an equilateral triangle as shown in the figure belov. (Let q-30 and L : 950 m 7.00 ,c 60.0 4.00 C (a) Calculate the electric field at the position of charge q due to the 7.00-C and-4.00-C charges. 5000 Once you calculate the magnitude of the field contribution from each charge you need to add these as vectors. kN/C i-60450 Does the -4.00-HC charge contribute to the y component of the field at the origin? kN/C (b) Use your answer to part (a) to determine the force on charge q 15 mN i181

Explanation / Answer

a) let q1 = 7 micro C

q2 = -4 micro C

at the position of q,

E1 = k*q1/L^2

= 9*10^9*7*10^-6/0.95^2

= 6.98*10^4 N/C

E2 = k*q2/L^2

= 9*10^9*4*10^-6/0.95^2

= 3.99*10^4 N/C

Enet = (-E1*cos(60) + E2) i - E1*sin(60) j

= (-6.98*10^4*cos(60) + 3.99*10^4) i - 6.98*10^4*sin(60) j

= 5000 i - 6.04*10^4 j

= (5.0 i - 60.4 j) kN/C <<<<<------Answer

Note: The final answer is in KN/C not in N/C

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