Lesson 7: Electric Power Transmission Wires can get hot when they carry a current because i . Thin wires have __ii__ resistance than thick ones. The statement above is completed correctly by the information in row . Select one: a. they do have a small resistance; less b. they do have a small resistance; more c. they do not have any resistance; less d. they do not have any resistance; more Clear my choice The resistance of a 500 m long wire is 1.50 Q. If that wire carries 600 A of current, the energy that converts to heat each second is a.bex109 W. The values ofa, b, c,andd are| 5 .| 4 ,| 0 and| 5 . The 1500 W space heater is designed to carry 7.50 A of current. The resistance of the heating element must be Q. Record your answer to three digits, inlcude a decimal if needed. An engineering company is hired to improve the efficiency of a transmission line. In their report, they discuss ways that will allow them to reduce the current by a factor of four. Assuming that this is done, by what factor will the power losses be reduced? Select one: a. two b. eight * . sixteen d. four Clear my choice When the electric grid was being designed originally, an AC system was chosen over a DC system. Which of the following is the reason why AC was chosen? Select one: a. AC is inherently safer than DC current. b. Although DC current can travel long distances efficiently, AC does the job quieter. * c. Itwas easy to transform low voltages to high voltages using AC. d. It was far cheaper to build the AC equipment than the DC equipment. Clear my choice