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CURRENTS & CHARGE CONTINUITY

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

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CURRENTS & CHARGE CONTINUITY

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  1. CURRENTS & CHARGE CONTINUITY

  2. Class Activities: current (1)

  3. Class Activities: Current (2)

  4. 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 B) Yes, to the left C) No D) Not enough information given

  5. 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 A) B) C) D) E) None of the above !

  6. 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 A) B) C) D) E) None of the above

  7. 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? 5.8 K a

  8. 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? 5.8 A) KB) 2KC) K/2D) Something else a

  9. 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? ERK5-1 • KB • aKB • abKB • bKB/a • KB/(ab) Bext a K b

  10. Charge Conservation Which of the following is a statement of charge conservation? 5.10

  11. Charge Conservation Which of the following is a statement of charge conservation? 5.10 A) B) C) D) E) Not sure

  12. Charge Conservation Which of the following is a statement of charge conservation? 5.10 A) B) C) D) E) Not sure

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