Week 26

Week 26 Physics, Circuits:

Physics

  • Reading: Knight, Ch 33. Read the whole chapter (and note 33.8 on inductors), but focus on sections 33.2, 33.3, 33.5.
    • Learning goal: to be able to use Faraday’s law to find the induced current in a circuit (which also requires understanding how to find the magnetic flux through a loop). Being able to do this means you’ll be able to understand how a generator works, or (if you run a generator in reverse…) how a motor works. Big stuff!
  • Problems: Ch 33, problems 2, 3, 4, 6, 11, 13, 49, 52, 63, 85.
    • Notes:#52: “terminal speed” in this case means the maximum speed.
    • Problem 85 is a challenge problem, and intended to be difficult.

Circuits

Become excited! After all this mucking about with passive (read: can’t add power, only lose it) circuits, we’re about to start on powered circuits. In particular, I’m skipping ahead to the EASIEST powered circuits, the golden land of “operational amplifiers” (see the picture on p 165 of the manual – we’ve skipped over everything in the lower hell, and right to the “golden rules” and “heavenly quad”), so-called op-amps. We can build amplifiers and radios with these.

I will go over how to use op-amps in class Tuesday; the book (& lab manual) assume you already understand transistors, which you don’t (since they’re harder, I skipped them for now : ) It will turn out to be surprisingly simple; a lot moreso than the text makes it look.

  • Please read the material but DO NOT freak out if it seems too hard. Rather, read enough that what I say Tuesday falls on fertile ground.
  • Reading:

Calculus

  • Reading: 16.1-16.3
  • Problems:
    • Monday Spring Drills 5, due 10 am Mon. May 9 via WileyPlus:
      • 16.1: 6, 8, 12
      • 16.2: 2, 4, 5, 7, 9, 25, 33, 34, 37
      • 16.3: 1, 4, 6, 19/20/21, 24, 33, 34, 36
      • Solutions
    • Wednesday Spring Problem Set #6, due noon Wed. May 11 outside Lab 2 3255:
      • 16.1: —
      • 16.2: 30, 36, 44, 50, 60
      • 16.3: 28, 38, 48, 66, 68
      • Solutions
  • Quiz 5 on Week 6 Material