Two charges 3×10^-8 C and -2×10^-8 C are located 15cm apart. At what point on the line joining the two charges is the electric potential zero ? Take the potential at infinity to be zero
Answers
Explanation:
Let the potential be zero at O, then VA + VB = 0, where is electric potential due to charge and is the electric potential due to charge . i.e. i.e. i.e. i.e. 5(0.16 ? x) = 3x i.e. 0.8 = 3x + 5x = ?8x or x = 0.1 m = 10 cm. Now taking the second case i.e. when x2 = 0.16 + x, we have or i.e. 5x = 3x ? 0.8 i.e. x = 0.4 m = 0.4 × 100 = 40 cm. i.e. electric potential is also zero at a distance of 40 cm from the charge q1.