A uniformly-loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is
A)one-fourth
B)one-third
C)one-half
D)twice

Question

Quizplus · Accepted Answer

When a uniformly-loaded DC distributor is fed at both ends with equal voltages, the voltage drop at the middle point is one-fourth of what it would be if the distributor were fed from one end only. This is because feeding from both ends effectively halves the maximum distance the current has to travel, reducing the total resistance encountered, and since power loss due to resistance is proportional to the square of the distance (for a uniform load), this results in a quarter of the voltage drop.

A Uniformly-Loaded D