PS250 PHYSICS III FOR ENGINEERS – Exam 3 Material Summary
Chapter 27 Learning Objectives: Continuation of this chapter following last exam... Calculate magnetic force on a
current-carrying conductor. Calculate torques on magnetic dipoles.
Lecture 19. Mastering Physics Assignment #7; Homework Problems: 27.41, 46, 48, 70, 74.
27.6 – Magnetic Force on a Current-Carrying Conductor
Board Examples: Magnetic force on straight / curved conductors. Also understand 27.7, 27.8.
27.7 – Force and Torque on a Current Loop
Board Examples: Forces on a half-circle current loop. Also understand 27.9, 27,10.
Chapter 28 Learning Objectives: Calculate magnetic field due to a moving charge. Calculate magnetic field due
to infinitesimal current elements and current-carrying wire segments. Calculate magnetic field due to very long
current-carrying conductors. Obtain force between parallel conductors. Calculate magnetic field due to loops of
current. Apply Ampere’s law to calculate magnetic fields due to solenoids, toroids, and cylinders.
Lecture 20-22. Mastering Physics #8; Homework Problems: 28.6, 17, 22, 24, 30, 36, 45, 46, 51, 74, 80, 83.
28.1 – Magnetic Field of a Moving Charge
Board Examples: 28.1
28.2 – Magnetic Field of a Current Element
Understand as basis for 28.3 derivation.
28.3 – Magnetic Field of a Current-Carrying Wire
Board Examples: 28.3, 28.4
28.4 – Force Between Parallel Conductors
Board Examples: 28.5 and similar. (Recall youtube video, too.)
28.5 – Magnetic Field of a Circular Current Loop
Board Examples: 28.6. On-board Biot-Savart calculations of fields due to loops (full and partial).
28.6, 28.7 – Ampere’s Law
Board Examples: 28.7, 28.8, 28.9, 28.10.
Chapter 29 Learning Objectives: Calculate electromotive force induced by changing magnetic flux (Faraday’s
Law). Correctly assess signs of induction effects via both Faraday’s Law and Lenz’s Law (recall our in-class demo!).
Understand basic concepts of generators and alternators (i.e., rotating loop in constant field, slide-wire).
Calculate emf and electric fields via Faraday’s law; understand motional emf. Calculate the displacement current
in parallel plate capacitors, and resulting magnetic fields. Understand physics behind Maxwell’s equations.
Lecture 23-25. Mastering Physics #8-9; Homework Problems: 29.7, 9, 17, 20, 23, 24, 35, 42, 69.
29.1 – Induction Experiments
In-class Demonstration: Magnets and the Induction Coil
29.2 – Faraday’s Law
Board Examples: My Own (also, 29.1, 29.2, 29.6, 29.7.)
29.3 – Lenz’s Law
Board Examples: 29.9, (In-detail, also understand the in-class demo).
29.4 – Motional Electromotive Force
Board Examples: 29.10, and relationship to slide-wire generator.
29.5 – Induced Electric Fields
Board Examples: 29.12, My own: field around and inside solenoid.
29.7 – Displacement Current and Maxwell’s Equations
Board Examples: My own: the charging parallel-plate capacitor, and resulting B-fields inside plates.
PS-250-07DB: Fall, 2015. Exam #3 Material Summary.
1/2
PS250 PHYSICS III FOR ENGINEERS – Exam 3 Material Summary
Chapter 30 Learning Objectives: Calculate mutual inductance for coils, solenoids, and toroids. Calculate self
inductance for coils, solenoids, toroids, and coaxial cables. Understand and apply inductance to calculate
magnetic fluxes and electromotive force. Understand and calculate energy storage associated with inductors
and magnetic fields. Understand R-L circuits and calculate initial turn-on and turn-off transients.
Lecture 25-27. Mastering Physics #9; Homework Problems: 30.2, 8, 11, 18, 24, 26, 48, 49, 73.
30.1 – Mutual Inductance
Board Examples: My Own (co-axial solenoids examples), 30.1, 30.2
30.2 – Self-Inductance and Inductors
Board Examples: 30.3, 30.4, relationship between inductance and volume of solenoid/toroidal solenoid.
30.3 – Magnetic Field Energy
Board Examples: Basic problems (30.5, 30.6), understand Magnetic field energy density vs. total energy.
30.4 – The R-L Circuit
Board Examples: My Own, 30.7, 30.8
PS-250-07DB: Fall, 2015. Exam #3 Material Summary.
2/2