full-wave rectifier with an l-section filter is used to supply a dc voltage of 250v at 100 ma to a resistive load. if the maximum permissible ripple factor is 2 percent determine a suitable combination of l and c which will yield the desired results. the fundamental power line frequency is 50 hz

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants