Which of the practices will lead to losses in electrical power transmission?

Question

A. Using transmission cables of large diameter
B. Transmitting at high voltage and low current
C. Transmitting at relatively low voltage and high current
D. Using a step-up transformer at the production end

Answer 1

i^2 R = power lost to heating resistance

high current ---> high loss

so for given power in = V i you want high voltage and low current to MINIMIZE losses. That is why long distance power lines are high voltage and are stepped down in your local neighborhood for safer lower voltage.

Answer 2

So according to your explanation, transmitting at high voltage and low current will lead to losses in electrical power transmission right? Which is option B. Though am not a science student rather Art but the question appeared on my hnd aptitude test, so I want to know the correct answer.