Power Transmission Line Energy Loss · PhysicsBowl 2023 #33
Physics · electromagnetism
Problem
A high-voltage power transmission line is to supply power at 10⁴ kW. The electricity travels through 30 km of cable that has a resistance 0.7 kmΩ. Find the rate of energy loss if the power is transmitted at 100 kV.
a. 4.2%
b. 4.9%
c. 2.1%
d. 9.8%
e. 6.4%