PHY 2049: Physics II

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PHY 2049 Physics II

• Tutoring Center is open in room NPB 1215, M-F
  1200AM -400PM. It is free.
• Exam I had an average of 7.5, a standard
  deviation of 2.26. A fine performance.

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HITT

• A parallel-plate capacitor has a plate area of
  0.3m2 and a plate separation of 0.1mm. If the
  charge on each plate has a magnitude of 5x10-6 C
  then the force exerted by one plate on the other
  has a magnitude of about
• A. 0 B. 5N C. 9N D. 1 x104 N E. 9 x 105 N

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HITT2

• Each of the four capacitors shown is 500 µF. The
  voltmeter reads 1000V. The magnitude of the
  charge, in coulombs, on each capacitor plate is
• A. 0.2 B. 0.5 C. 20 D. 50 E. none of these

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Currents and Resistance

• Current and current density
• Resistance and Resistivity
• Thermal variations
• Ohms law
• Power in Electrical Circuits

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Curretns and Current Density

• Current
• Current density
• Resistance
• Drift velocity
• Resistivity
• Power

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materials

• Metals
• Semiconductors
• Insulators
• Superconductors (Florida connection)

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Superconductors

• J. R. Schrieffer (!931- )
• National High Magnetic Field Laboratory

http//nobelprize.org/nobel_prizes/physics/laureat
es/1972/schrieffer-bio.html