In the figure a plastic rod having a uniformly distributed charge Q = -27.2 pC has been bent into a circular arc of radius 1.82 cm and central angle 120°. With V=0 at infinity, what is the electric potential in volts at P, the center of curvature of the rod? e

A point charge q₁ = 3.90 nC is placed at the origin, and a second point charge q2 = -2.95 nC is placed on the x-axis at x = +20.0 cm. A third point charge q3 = 2.10 nC is to be placed on the x-axis between q₁ and 92. (Take as zero the potential energy of the three charges when they are infinitely far apart.) ▼ Part A What is the potential energy of the system of the three charges if q3 is placed at x = + 11.0 cm ? V—| ΑΣΦ U= 9.5 107 8 Submit Part B X Incorrect; Try Again ● x = 7.62 cm Previous Answers Request Answer ✔ Correct Where should q3 be placed between q₁ and q2 to make the potential energy of the system equal to zero? Previous Answers ? J

A parallel-plate capacitor is formed from two 7.0 cm ×7.0 cm electrodes spaced 2.0 mm apart. The electric field strength inside the capacitor is 1.0×10^6 N/C What is the charge (in nC) on the positive electrode? What is the charge (in nC) on the negative electrode?

2. A thin rod of length L lies along the x-axis. It has a uniform linear charge distribution ho. b) What is the strength of the electric field at the point x? (You can find the answer by doing another integral, differentiate your answer from part (a): Ex = -dV/dx.) or you can simply a) What is the value of the electric potential at a given point x located to the right of the rod? Take V=0 at infinity.