 Ampere's Law
 Magnetic Field of a Straight CurrentCarrying Wire
 Force Between Parallel Wires
 Magnetic Field of Two Infinite Currents
 Conceptual BiotSavart and Ampere's Law Questions
 Ampere's Law with Infinite Currents
 Magnetic Field of Four Parallel Currents
 Two Parallel Currents
 Interactions of CurrentCarrying Wires
 Stacked CurrentCarrying Loops
 Magnetic Field of a Current Element
 Integrating Around a Ring of Current
 The Ring of Current
 Two Wires in Parallel
 Two Wires in Series
 Two Rings of Current Attracting
 Two Rings of Current Repelling
 Magnetic Field of a Helmholtz Coil (Aligned)
 Magnetic Field of a Helmholtz Coil (AntiAligned)
 Two CurrentCarrying Rings
 The Magnetic Field of a Wire and a Compass
Ampere's Law
Statement; field of currentcarrying wire and sheet; units; divergence of B and interpretation.

8.022 Electricity and Magnetism, Fall 2004
Prof. Gabriella Sciolla
Course Material Related to This Topic:
Magnetic Field of a Straight CurrentCarrying Wire
Worked example using the BiotSavart Law to calculate the magnetic field due to a linear segment of a currentcarrying wire or an infinite currentcarrying wire.

8.02 Physics II: Electricity and Magnetism, Spring 2007
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Robert Redwine, Prof. Bruce Knuteson, Prof. Gunther Roland, Prof. Bolek Wyslouch, Dr. Brian Wecht, Prof. Eric Katsavounidis, Prof. Robert Simcoe, Prof. Joseph Formaggio, Andy Neely, Matthew Strafuss, Prof. Eric Hudson, Dr. SenBen Liao
Course Material Related to This Topic:
 Read chapter 9, pages 47 of online textbook
Force Between Parallel Wires
Uses BiotSavart Law to determine the magnetic force between two parallel infinite currentcarrying wires.

8.02 Physics II: Electricity and Magnetism, Spring 2007
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Robert Redwine, Prof. Bruce Knuteson, Prof. Gunther Roland, Prof. Bolek Wyslouch, Dr. Brian Wecht, Prof. Eric Katsavounidis, Prof. Robert Simcoe, Prof. Joseph Formaggio, Andy Neely, Matthew Strafuss, Prof. Eric Hudson, Dr. SenBen Liao
Course Material Related to This Topic:
 Read chapter 9, pages 134 of online textbook
Magnetic Field of Two Infinite Currents
Determine the magnetic field along the axis between two infinite wires and determine where the field is the greatest. Solution is included after problem.

8.02 Physics II: Electricity and Magnetism, Spring 2007
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Robert Redwine, Prof. Bruce Knuteson, Prof. Gunther Roland, Prof. Bolek Wyslouch, Dr. Brian Wecht, Prof. Eric Katsavounidis, Prof. Robert Simcoe, Prof. Joseph Formaggio, Andy Neely, Matthew Strafuss, Prof. Eric Hudson, Dr. SenBen Liao
Course Material Related to This Topic:
 Complete practice problems on page 557
Conceptual BiotSavart and Ampere's Law Questions
Describe the application of BiotSavart and Ampere's Laws; characterize magnetic attraction or repulsion between steady current configurations.

8.02 Physics II: Electricity and Magnetism, Spring 2007
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Robert Redwine, Prof. Bruce Knuteson, Prof. Gunther Roland, Prof. Bolek Wyslouch, Dr. Brian Wecht, Prof. Eric Katsavounidis, Prof. Robert Simcoe, Prof. Joseph Formaggio, Andy Neely, Matthew Strafuss, Prof. Eric Hudson, Dr. SenBen Liao
Course Material Related to This Topic:
 Complete practice problems on page 62
Ampere's Law with Infinite Currents
Use Ampere's Law to find the magnetic field due to an infinitely long currentcarrying wire; then calculate a circulation involving eight infinite currents and discuss the utility of Ampere's Law.

8.02 Physics II: Electricity and Magnetism, Spring 2007
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Robert Redwine, Prof. Bruce Knuteson, Prof. Gunther Roland, Prof. Bolek Wyslouch, Dr. Brian Wecht, Prof. Eric Katsavounidis, Prof. Robert Simcoe, Prof. Joseph Formaggio, Andy Neely, Matthew Strafuss, Prof. Eric Hudson, Dr. SenBen Liao
Course Material Related to This Topic:
 Complete practice problems on page 63
Magnetic Field of Four Parallel Currents
Find the magnetic field at the center of a square configuration of four infinitely long currentcarrying wires.

8.02 Physics II: Electricity and Magnetism, Spring 2007
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Robert Redwine, Prof. Bruce Knuteson, Prof. Gunther Roland, Prof. Bolek Wyslouch, Dr. Brian Wecht, Prof. Eric Katsavounidis, Prof. Robert Simcoe, Prof. Joseph Formaggio, Andy Neely, Matthew Strafuss, Prof. Eric Hudson, Dr. SenBen Liao
Course Material Related to This Topic:
 Complete practice problems on page 656
Two Parallel Currents
Do two parallel currentcarrying wires attract or repel one another?

8.02 Physics II: Electricity and Magnetism, Spring 2007
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Robert Redwine, Prof. Bruce Knuteson, Prof. Gunther Roland, Prof. Bolek Wyslouch, Dr. Brian Wecht, Prof. Eric Katsavounidis, Prof. Robert Simcoe, Prof. Joseph Formaggio, Andy Neely, Matthew Strafuss, Prof. Eric Hudson, Dr. SenBen Liao
Course Material Related to This Topic:
 Complete practice problems on page 1
Interactions of CurrentCarrying Wires
Explaining in words why parallel currents attract and antiparallel currents repel.

8.02X Physics II: Electricity and Magnetism with an Experimental Focus, Spring 2005
Dr. Peter Dourmashkin, Prof. Gunther Roland
Course Material Related to This Topic:
 Complete practice problem 1
 Check solution to practice problem 1
Stacked CurrentCarrying Loops
Finding field of one loop and force exerted on the other.

8.02X Physics II: Electricity and Magnetism with an Experimental Focus, Spring 2005
Dr. Peter Dourmashkin, Prof. Gunther Roland
Course Material Related to This Topic:
 Complete exam problem 4
 Check solution to exam problem 4
 Complete exam problem 5
 Check solution to exam problem 5
Magnetic Field of a Current Element
Applet showing the magnitude and direction of the magnetic field created by a small segment of current.

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation
Integrating Around a Ring of Current
Applet demonstrating the method if integrating around a ring of current to find the magnetic field at a point above the ring.

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation
The Ring of Current
Applet showing the magnitude and direction of the magnetic field at any point in or around a ring of current.

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation
Two Wires in Parallel
Video animation showing the magnetic field and behavior of two wires with current flowing in the same direction.

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation
Two Wires in Series
Video animation showing the magnetic field and behavior of two wires with current flowing in different directions.

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation
Two Rings of Current Attracting
Video animation showing the magnetic field and attraction of two coaxial wire loops with current flowing in the same direction.

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation
Two Rings of Current Repelling
Video animation showing the magnetic field and behavior of two coaxial wire loops with current flowing in different directions.

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation
Magnetic Field of a Helmholtz Coil (Aligned)
Video animation showing the magnetic field generated by a Helmholtz Coil when the two coils have current flowing in the same direction (magnetic dipole moments aligned).

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation
Magnetic Field of a Helmholtz Coil (AntiAligned)
Video animation showing the magnetic field generated by a Helmholtz Coil when the two coils have current flowing in different directions (magnetic dipole moments antialigned).

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation
Two CurrentCarrying Rings
Interactive applet showing the magnetic field created by two rings with variable position, orientation, size, and current.

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation
The Magnetic Field of a Wire and a Compass
Interactive applet simulating the magnetic field and interactions of a currentcarrying wire and a compass needle.

8.02T Physics (Electricity and Magnetism) Labs, Spring 2005
Prof. John Belcher, Dr. Peter Dourmashkin, Prof. Michael Feld, Prof. Eric Hudson, Prof. John Joannopoulos, Prof. Bruce Knuteson, Dr. George Stephans
Course Material Related to This Topic:
 Interact with a Java Simulation