currents & charge continuity
DESCRIPTION
CURRENTS & CHARGE CONTINUITY. Class Activities: current (1). Class Activities: Current (2). Positive ions flow right through a liquid, negative ions flow left. The spatial density and speed of both ions types are identical. Is there a net current through the liquid?. 5.5. Yes, to the right - PowerPoint PPT PresentationTRANSCRIPT
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CURRENTS & CHARGE CONTINUITY
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Class Activities: current (1)
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Class Activities: Current (2)
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Positive ions flow right through a liquid, negative ions flow left. The spatial density and speed of both ions types are identical.Is there a net current through the liquid?
A)Yes, to the rightB) Yes, to the leftC) NoD) Not enough information given
5.5
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A) B)
C) D)
E) None of the above !
Current I flows down a wire (length L) with a square cross section (side a) If it is uniformly distributed over the entire wire area, what is the magnitude of the volume current density J?
5.7
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A) B)
C) D)
E) None of the above
Current I flows down a wire (length L) with a square cross section (side a) If it is uniformly distributed over the outer surfaces only, what is the magnitude of the surface current density K?
5.6
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A "ribbon" (width a) of surface current flows (with surface current density K) Right next to it is a second identical ribbon of current. Viewed collectively, what is the new total surface current density?
Ka
5.8
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A "ribbon" (width a) of surface current flows (with surface current density K) Right next to it is a second identical ribbon of current. Viewed collectively, what is the new total surface current density?
A) KB) 2KC) K/2D) Something else
a
5.8
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A "ribbon" (width a) with uniform surface current density K passes through a uniform magnetic field Bext. Only the length b along the ribbon is in the field. What is the magnitude of the force on the ribbon?
A) KB
B) aKB
C) abKB
D) bKB/a
E) KB/(ab)
ERK5-1
a
b
Bext
K
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Charge Conservation
Which of the following is a statement of charge conservation?
5.10
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Charge Conservation
Which of the following is a statement of charge conservation?
A) B)
C) D)
E) Not sure
5.10
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Charge Conservation
Which of the following is a statement of charge conservation?
A) B)
C) D)
E) Not sure
5.10