8/01  In the HW for Aug 4, please drop Wolfson Chapter 32 
      #'s 36 and 64 and add the following two problems from 
      Young and Freedman 11th Edition (these have also been
      added on the Unit 4 problems page).  Also, in the MC of 
      Old Test 4, do not study questions 11 and 12 -- we will 
      not cover that topic this summer. GBA

      Y 31:60
      You enjoy listening to KONG-FM, which broadcasts at 94.1 MHz.
      You destest listening to KRUD-FM, which broadcasts at 94.0 MHz.
      You live the same distance from both stations and both 
      transmitters are equally powerful, so both radio signals 
      produce the same 1.0 V source voltage as measured at your
      house.  Your goal is to design an LRC radio circuit with
      the following properties: i) It gives the maximum power
      response to the signal from KONG-FM; ii) the average power
      delivered to the resistor in response to KRUD-FM is 1.00%
      of the average power in response to KONG-FM.  This limits
      the power received from the unwanted station, making it
      inaudible.  You are required to use an inductor with 
      L = 1.00 microH.  Find the capacitance C and resistance
      R that satisfy the design requirements.

      Y 32:47
      A circular loop of wire can be used as a radio antenna. If an 
      antenna with a diameter of 18.0 cm is located a distance of 
      2.50 km away from a from a source with a total power of 
      55.0 kW at a frequency of 95.0 MHz, what is the maximum emf 
      induced in the loop? (Assume that the plane of the antenna 
      loop is perpendicular to the direction of the radiation's 
      magnetic field and that the source radiates uniformly in all 
      directions.) Hint for Problem 32.47: This is a Faraday's Law 
      problem, but with a radiated B field that is varying 
      sinusoidally (so you can write B(t) as Bmax*sin(omega*t) and 
      differentiate to get the maximum value of dB/dt). GBA

7/25  HW problem Wolfson Chapter 31 #33 part (d), 
      assigned on Tue July 26, is poorly written.  
      The problem intends to ask for the RATE at 
      which work is being done by the agent pulling 
      the bar.  GBA

7/15  For the lecture on Mon July 18, please download
      the Definitions for Current and Resistance from
      our class web page and bring them with you to
      lecture.  I will not write these definitions on
      the overhead as usual.  Thanks.  GBA

7/14  In the Old Tests available from the Noble Library
      Copy Center, page 5/6 of Test 2 has been switched
      with page 5/6 of Test 4.  The correct Problem 1 of
      Test 2 is a partially-filled parallel plate
      capacitor.

7/12  In the Homework for July 13, please drop Ch 25:2
      and add Ch 25:44 in its place.  Thanks. GBA

7/06  The Old Tests, with solutions, are now 
      available in the Noble Library Copy Center.

6/25  No Updates Yet