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Physics 122: Weekly Assignments and Concepts - Dielectrics and Superconductors, Assignments of Physics

New Mexico Institute of Mining & Technology (NMT)Physics

The weekly assignments and concepts for physics 122, including homework problems, reading assignments, and clicker questions. Topics covered include dielectrics, superconductors, and the fluid analogy for electrical circuits.

Typology: Assignments

Pre 2010

Uploaded on 08/08/2009

koofers-user-rup
koofers-user-rup 🇺🇸

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Phys. 122-02: Monday, 29 September
•HW 4: due today (by 5 pm under my office door).
•HW 5: Chapter 24, problems 14, 21, 24, and 30,
and chapter 25, problems 21 and 48 (due in a week).
•Mastering Physics: Third assignment due tomorrow
at midnight. Fourth assignment due a week later.
•Reading: Read chapter 25 about resistors in series
and parallel by Wednesday (tomorrow for Tuesday
recitation folks), and finish chapter 25 by Friday.
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Download Physics 122: Weekly Assignments and Concepts - Dielectrics and Superconductors and more Assignments Physics in PDF only on Docsity!

Phys. 122-02: Monday, 29 September

  • (^) HW 4: due today (by 5 pm under my office door).
  • (^) HW 5: Chapter 24, problems 14, 21, 24, and 30, and chapter 25, problems 21 and 48 (due in a week).
  • (^) Mastering Physics: Third assignment due tomorrow at midnight. Fourth assignment due a week later.
  • (^) Reading: Read chapter 25 about resistors in series and parallel by Wednesday (tomorrow for Tuesday recitation folks), and finish chapter 25 by Friday.

Dielectric: An insulator which is placed

in between the conductors of a capacitor

(gives C = κ C 0 )

Two important numbers for a dielectric: the

dielectric constant ( κ ) and the maximum E

field strength before it sparks (breakdown E )

Clickers: We've said that a conductor is

something which has lots of charges that

can flow freely.

What is a superconductor?

  • (^) a) A metallic hero who keeps ordinary conductors safe from criminals
  • (^) b) A conductor whose charges are all free to move
  • (^) c) A conductor that can conduct current across both space and time
  • (^) d) A conductor held at dangerously high voltage
  • (^) e) Just what we've been calling a conductor so far

Clickers: It's a constant trouble to keep

track of the minus sign in the electron's

charge! Whom should you blame??

  • (^) a) Thomas Edison
  • (^) b) Wolfson (your textbook author)
  • (^) c) Thomas Jefferson
  • (^) d) Benjamin Franklin
  • (^) e) Nikola Tesla

The fluid (water) analogy... updated

Electrical Thing  Charge  Voltage  Electric Field  Superconductor  Capacitor  Current (in a wire)  Resistor Fluid thing  Fluid (water)  Pressure  Pressure difference  (Unrestricted) pipe  Water tank  Current (in a pipe)  Pipe filled with sand

Clickers: For a capacitor in a circuit,

what does the power represent in

P = I ΔV?

  • (^) a) Energy per time being stored in the capacitor
  • (^) b) Energy per time being released from it
  • (^) c) It depends upon the relative direction of I and the difference in potential
  • (^) d) The power is being used by resistors in the same circuit
  • (^) e) The power gained by each electron