A copper cable is designed to carry a current of 330 A with a power loss of 2.00 W/m. What is the required radius of this cable? pcopper = 1.7 x 10-8
Ohm's law
Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.
Path of Least Resistance
In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.
1) A copper cable is designed to carry a current of 330 A with a power loss of 2.00 W/m. What is the required radius of this cable? pcopper = 1.7 x 10-8
| 0.0103 m | 0.0009 m |
| 0.0446 m | 0.0172 m |
2) An electric utility company supplies a customer’s house from the main power lines (120 V) with two copper wires, each of which is 110.0 m long and has a resistance of 0.12 per 400 m. Find the power delivered to the customer and assume that a load current at the customer’s house is 140 A.
| 32,340 W | 16,800 W |
| 16,153 W | 15,506 W |
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