Which statement is correct? Current causes voltage. Current flow through a circuit. Voltage flows a through a circuit. Resistance is established across a circuit. When you stretch a copper wire so that it becomes thinner, the resistance between its ends: increases decreases remains unchanged A power line with a resistance of 2 ohms has a current of 80 A current in it. The power dissipated in the line is: 40 W   320 W 160 W   12800 W

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter17: Current And Resistance
Section: Chapter Questions
Problem 2CQ: A 12-V battery is connected across a device with variable resistance. As the resistance of the...
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  • Which statement is correct?
    1. Current causes voltage.
    2. Current flow through a circuit.
    3. Voltage flows a through a circuit.
    4. Resistance is established across a circuit.
  • When you stretch a copper wire so that it becomes thinner, the resistance between its ends:
    1. increases
    2. decreases
    3. remains unchanged
  • A power line with a resistance of 2 ohms has a current of 80 A current in it. The power dissipated in the line is:
    1. 40 W   320 W
    2. 160 W   12800 W
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