a a a Figure P24.15

In the figure a charged particle (either an electron or a proton) is moving rightward between two parallel charged plates separated by distance d = 2.00 mm. The plate potentials are V₁ = -62.0 V and V2=-49.0 V. The particle is slowing from an initial speed of 88.0 km/s at the left plate. (a) Is the particle an electron or a proton? (b) What is its speed just as it reaches plate 2? (a) proton (b) Number i Units m/s

As seen in the figure the points A, B, C, and D are on the circle. O is the center and Ris the radius of the circle. Two charges Q, and Q are placed at points A and B, respectively. What must be the charge at C to have electric potential zero at point D. (VD =0)? (V = 0) A) (-3)(3-√3)Q B) (-3) (3+√3)Q c) (-) (2 + √2)Q D) (-) (2-√2)Q E) (-3) Q D

An infinitely long metal cylinder has radius R0 and charge per unit length λ. It is held at potential V0, which you should use as the reference point for this problem. The cylinder is solid (not hollow) and in electrostatic equilibrium. (a) Find the electric potential outside the cylinder, for a distance r > R0 from the center of the cylinder. (b) Find the electric potential inside the cylinder, at a distance r < R0 from the center of the cylinder.