PHY 106: The Week beginning Apr. 23

• Answers to Homeworks 9, 10 and 11:
  
  Homework 9:
  1. E = 4,826 x 10⁷ N/C
  2. Magnitude 14.824 N/C, angle 55 degrees below the negative (left) horizontal (x axis) in quadrant III
  3. E = 2.16 x 10⁶ N/C (to right)
  4. A. electric field zero by symmetry, direction undefined; B. Potentials have no direction, V = 2.82 x 10⁶ volts
  
  Homework 10:
  1. C_eq = 5.2 microfarads; the 3- and 2-microfarad capacitors each have a charge of 12 microcoulombs, the 4-microfarad capacitor has a charge of 40 microcoulombs
  2. V = 8.04 x 10⁵ volts
  3. V = -5x for 0 < x < 0.01, where x is measured in meters and the potential is grounded at x=0
  
  Homework 11:
  1. A. Q = 20 mC; B. t = 4.16 s; C. t = 6.93 s
  2. 4-kilo-ohm resistor current 0.471 mA down; 2-kilo-ohm resistor current .117 mA down
  3. 1.509 kilo-ohm
  
  
• Tuesday:
  
  Review for Test 3
  Test 3
  
  
• Thursday:
  
  Lab final in H 101
  Word
  Excel
  
  
• Friday:
  
  Review