Physics 121 Lecture Summaries

1
Physics 121 Lecture Summaries

• Contents

Lecture 1 Introduction to Fields
Lecture 2 Electric Charge
Lecture 3 Electric Field
Lecture 4 Gausss Law
Lecture 5 Electrostatic Potential
Lecture 6 Capacitance
Lecture 7 Resistance and Resistivity, Circuits Part 1
Lecture 8 DC Circuits, Part 2
Lecture 9 Magnetic Fields
Lecture 10 Magnetic Fields from Currents
Lecture 11 Induction I Faradays Law
Lecture 12 Induction II LR Circuits
Lecture 13 LCR and AC Circuits, Oscillations
Summary Phase Relations in AC Circuits
9/21/2008
2
Summary Electric Charge

Lecture 2
3
Summary Electric Field

Lecture 3
4
Lecture 4
Summary Gausss Law
5
Summary Electric Potential

Lecture 5
6
Summary Capacitance

Lecture 6
7
Summary Lecture 7 - Resistance and
Resistivity
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Summary Lecture 7 Resistive Circuits

• An emf device does work on charges to maintain a
  potential difference between its output
  terminals.
• Kirchhoffs rules
• Loop rule. The algebraic sum of the changes
  in potential encountered in a complete traversal
  of any loop of a circuit must be zero.
• Junction rule. The sum of the current
  entering any junction must be equal to the sum of
  the currents leaving that junction.
• Series resistances when resistances are in
  series, they have the same current. The
  equivalent resistance that can replace a series
  combination of resistance is
• Parallel resistance when resistances are in
  parallel, they have the same potential
  difference. The equivalent resistance that can
  replace a parallel combination of resistance is,
• Single loop circuits the current in a single
  loop circuit is given by
• Power when a real battery of emf and internal
  resistance r does work on the charges in a
  current I through the battery,

9
Summary Lecture 7/8A - Circuits, Part 1


10
Summary Lecture 8B RC Circuits, Part 2

11
Summary Lecture 9 Magnetic Fields

12
Summary Lecture 10 Magnetic Fields from
Currents

13
Summary Lecture 11 Induction I Faradays Law

14
Summary Lecture 12 Induction II LR Circuits
15
Summary Lecture 13/14 - LCR AC Circuits,
Oscillations
16
Summary Phase Relations in AC Circuits