Answered: ___12. Electrons are made to flow in a…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 94PE: Construct Your Own Problem Consider a person working in an environment where electric currents might...

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___12. Electrons are made to flow in a wire when there is:
A. an imbalance of charges in the wire.
B. a potential difference across its ends.
C. more potential energy at one end of the wire than the other

___13. Which statement is correct?
A. Current causes voltage.
B. Current flow through a circuit.
C. Voltage flows a through a circuit.
D. Resistance is established across a circuit.

___14. When you stretch a copper wire so that it becomes thinner, the resistance between its
ends:
A. increases
B. decreases
C. remains unchanged

___15. 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:
A. 40 W C. 320 W
B. 160 W D. 12800 W

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