Question

"0000" gauge copper wire has a cross-sectional radius of 2.6cm. The resistivity of copper is 1.72 times 1-8ohmm. The circumference of the earth at the equator is 4.0 times 107m. What is the resistance of a piece of "0000"gauge wire that has been wrapped around the earth at the equator? 1200 ohm 840 ohm 320 ohm 0.032 ohm 0.084 ohm Select the following statement which is true about current flow. Select One of the Following: Current flows along lines of equal potential. Current flows from low potential to high potential. Current flows from high potential to low potential. The direction current flows is independent of the potential. carbon nanotube is a cylindrical tube formed of carbon atoms bonded into a hollow circular cylinder. The typical cross-sectional radius of a carbon nanotube is 0.7nm = 7 times 10-lom. A typical length for a carbon nanotube is 5 times 10-5m. The resistivity of a carbon nanotube is 1 times 10-6ohmm. Compute the resistance of a carbon nanotube along it long dimension. Select One of the Following: 8 times 10 6 ohm 1 times 10 6 ohm 8 times 10 2 ohm 2 times 10 5 ohm 3 times 10 7 ohm What type of current is produced by plugging something into a house electrical outlet? Select One of the Following: direct current regular current alternating current magnetic current chemical current A certain direct current circuit carries a current of 0.50A flowing through a wire. We will assume that the charged particles that move in the wire are electrons. How many electrons flow through a cross-section of the wire in 1.0 minute?

Answer 1