"bhetic field inside a 5.0-cm-diameter superconducting solenoid varies sinusoidally between 101 and 14 t at a frequency of 10 hz. a) what is maximum electric field strength at a point 2 cm from the solenoid axis? b) what is the value of b at the instant e reaches its maximum value?

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c