Current Attempt in Progress Two long, charged, thin-walled, concentric cylindrical shells have radii of 3.4 and 6.1 cm. The charge per unit length is 6.3 x 10" C/mon the inner shell and -9.8 * 10- C/m on the outer shell. What are the (a) magnitude E and (b) direction (radially inward or outward) of the electric field at radial distancer - 4.3 cm? What are (c) E and (d) the direction at r - 8.5 cm? (a) Number i Units (b) (c) Number i Units (d)A positively charged particle is held at the center of a spherical shell. The figure gives the magnitude E of the electric field versus radial distance r. The scale of the vertical axis is set by E, = 13.0 = 107 N/C. Approximately, what is the net charge on the shell? Assume r, =4 cm. E, E (107 N/C) i i 2r, 31, 4, By, rlem) Mumber n Units v Current Attempt in Progress Charge of uniform volume density p - 2.1 nC/m fills an infinite slab between x - -4.7 cm and x - +4.7 cm. What is the magnitude of the electric field at any point with the coordinate (a) x - 3.2 cm and (b) x - 6.9 cm? (a) Number i Units (b) Number Units