Which are true? a) Current is the total amount of charge that passes through a conductor's full cross section at any point per unit time. b) By convention, the direction of a current is taken to be the direction of flow for negative charges. c) When an electric field is applied to a conductor, the free electrons move only in the direction opposite the applied electric field. d) In order to maintain a steady flow of current in a conductor, a steady force must be maintained on the mobile charges. e) In a circuit, current is delivered by the positive terminal of a battery, and it is used up by the time it returns to the negative terminal of the battery.
Which are true? a) Current is the total amount of charge that passes through a conductor's full cross section at any point per unit time. b) By convention, the direction of a current is taken to be the direction of flow for negative charges. c) When an electric field is applied to a conductor, the free electrons move only in the direction opposite the applied electric field. d) In order to maintain a steady flow of current in a conductor, a steady force must be maintained on the mobile charges. e) In a circuit, current is delivered by the positive terminal of a battery, and it is used up by the time it returns to the negative terminal of the battery.
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 17PE: SPEAR, a storage ring about 72.0 m in diameter at the Stanford Linear Accelerator (closed in 2009),...
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Question
Which are true?
a) Current is the total amount of charge that passes through a conductor's full cross section at any point per unit time.
b) By convention, the direction of a current is taken to be the direction of flow for negative charges.
c) When an electric field is applied to a conductor, the free electrons move only in the direction opposite the applied electric field.
d) In order to maintain a steady flow of current in a conductor, a steady force must be maintained on the mobile charges.
e) In a circuit, current is delivered by the positive terminal of a battery, and it is used up by the time it returns to the negative terminal of the battery.
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