Three charges Q_A = -2.0 μC, Q_B= 6.0 μC, and Q_C= -4.0 μC are located along the y-axis at y_A=-4.0 cm, y_B= 0, and y_C = 2.0 cm respectively. Calculate the electric potential at the point x = 6.0 cm on the x-axis.

Question

Quizplus · Accepted Answer

The electric potential at a point due to a point charge is given by V = kQ/r, where k is Coulomb's constant, Q is the charge, and r is the distance between the point and the charge. In this case, the electric potential at the point x = 6.0 cm on the x-axis due to the three charges is:V = kQ_A/r_A + kQ_B/r_B + kQ_C/r_C= (9 × 10⁹ N m²/C²)(-2.0 × 10^-6 C)/(0.06 m) + (9 × 10⁹ N m²/C²)(6.0 × 10^-6 C)/(0.06 m) + (9 × 10⁹ N m²/C²)(-4.0 × 10^-6 C)/(0.04 m)= -0.81 × 10⁵ VTherefore, the correct answer is A.

Three Charges QA = -2

Three Charges Q_A = -2