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Force and current_aplc.ppt
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Collections of Charges: Current Carrying Wires
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Demonstration: Jumping Wire
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Magnetic Force on Current-Carrying Wire
Current is moving charges, and we know that moving charges feel a force in a magnetic field
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Magnetic Force on Current-Carrying Wire
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PRS Question: Parallel Current Carrying Wires
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PRS: Parallel Wires
Consider two parallel current carrying wires. With the currents running in the same direction, the wires are
attracted (likes attract?)
repelled (likes repel?)
pushed another direction
not pushed – no net force
I don’t know
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PRS Answer: Parallel Wires
I1 creates a field into the page at I2. That makes a force on I2 to the left.
I2 creates a field out of the page at I1. That makes a force on I1 to the right.
Answer: 1. The wires are attracted
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Demonstration: Parallel & Anti-Parallel Currents
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Summary Magnetic Force
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Can we understand why?
Whether they attract or repel can be seen in the shape of the created B field
(Animation)
(Animation)
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Field Pressures and Tensions: A Way To Understand the qVxB Magnetic Force
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Speakers
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Speakers
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DC Motor
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