Q 12-07-030NEETJEE MainMedium
Power is transmitted over long distances at high voltage because
Answer: (A) the current, and hence the $I^2R$ loss in the lines, is smaller
Concept. For a given power $P = VI$, the line loss is $I^2R$.
Step 1. Apply. A higher voltage means a smaller current, so the $I^2R$ loss falls sharply.
Answer. The current, and hence the $I^2R$ loss in the lines, is smaller (Option A).
Solution by Sreeraj P, M.Sc Physics