Asingle-phase 50-kva, 2400/240-volt, 60-hz distribution transformer is used as a step-down transformer at the load end of a 2400-volt feeder whose series impedance is ð1: 0 þ j2: 0þ ohms. the equivalent series impedance of the transformer is ð1: 0 þ j2: 5þ ohms referred to the high-voltage (primary) side. the transformer is delivering rated load at 0.8 power factor lagging and at rated secondary voltage. neglecting the transformer exciting current, determine (a) the voltage at the transformer primary terminals, (b) the voltage at the sending end of the feeder, and (c) the real and reactive power delivered to the sending end of the feeder.

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.