Questions 2-4. Three charged particles are arranged as shown in the picture belo

Question

Questions 2-4. Three charged particles are arranged as shown in the picture below. Their charges are q,-luC, q,--1 C and q3-2 C. Take k-9, 109 Nm2/C2 1 m 7i 12 3 m 2. What is the electrostatic force on particle with charge qi due to charge q2? (a) V3.10'N (b) 1.10 N 3. What is the electrostatic force on particle with charge g2 due to charge qs? (c) 1.103 N (d) 3.10-3N o 10N (0)10N 9.10 N (a)103N (b) 1 103N (c) 10-3 N (d) 9.103N 4) What is the net electrostatic force on particle with charge q? (a) 325 10'N (b) V8110'N (c) 325 10 N (d) 3.10*N

Explanation / Answer

4) Force on q1 due to q2 = F12 = kq1q2/r^2 = 9*10^9*10^-12/9 = 10^-3 N (along +x-direction)

  Force on q1 due to q3 = F13 = kq1q3/r^2 = 9*10^9*2*10^-12/1 = 18*10^-3 N (along -y-direction)

Net Force on q1 = F =sqrt[F12^2 + F13^2] = sqrt(325)*10^-3 N (Option C is correct)

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