Parallel Currents d L Current I1 produces a B-field I1 I2 B1 xxxx

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Presentation transcript:

Parallel Currents d L Current I1 produces a B-field I1 I2 B1 xxxx This B-field exerts a force on current I2 (and vice versa) What is the direction of force on I2 due to I1 ? (hint: use both right hand rules) What is the magnitude of force on I2 due to I1 ? (hint: use both equations)

B I A What is the direction of the magnetic field at points A and B due to the currents in the wires? A B Into screen Out of screen Out of screen Into screen No field Into screen No field Out of screen

Force between Two Parallel Wires Parallel currents attract; anti-parallel currents repel. F F

The magnetic field produced at the position of wire 2 due to the current in wire 1 is: The force this field exerts on a length L of wire 2 is:

The current in the top wire is larger then in the bottom wire. Which force diagram represents the forces acting on the wires due to only the magnetic fields? Construct a force diagram that represents the forces acting on the wires due to only the magnetic fields. 1 2 3